[gnome-nibbles/arnaudb/rework-warps: 1/8] Make levels more human readable.

[Arnaud B. <arnaudb src gnome org>]

commit 356e713b9ddfe67ecd38257837a97a409b40bd84
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sat Jun 20 22:59:41 2020 +0200

    Make levels more human readable.

 data/levels/level001.gnl | 100 +++++++++++++++++------------------
 data/levels/level002.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level003.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level004.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level005.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level006.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level007.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level008.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level009.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level010.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level011.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level012.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level013.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level014.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level015.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level016.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level017.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level018.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level019.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level020.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level021.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level022.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level023.gnl | 128 ++++++++++++++++++++++-----------------------
 data/levels/level024.gnl | 108 +++++++++++++++++++-------------------
 data/levels/level025.gnl | 132 +++++++++++++++++++++++------------------------
 data/levels/level026.gnl | 128 ++++++++++++++++++++++-----------------------
 src/nibbles-game.vala    |  79 +++++++++++++++++++++++-----
 src/nibbles-test.vala    | 132 +++++++++++++++++++++++------------------------
 src/nibbles-view.vala    |   1 -
 29 files changed, 1817 insertions(+), 1763 deletions(-)
---
diff --git a/data/levels/level001.gnl b/data/levels/level001.gnl
index 115441e..e924989 100644
--- a/data/levels/level001.gnl
+++ b/data/levels/level001.gnl
@@ -1,12 +1,12 @@
-fcccccckg........fkcccccccccccccccccccccccccccccccccccccccccccccccccccccckg........fkccccccg
-b......de........de......................................................de........de......b
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+┃......┗┛........┗┛......................................................┗┛........┗┛......┃
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@@ -15,36 +15,36 @@ de..............................................................................
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-fg........................................................................................fg
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-de........................................................................................de
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@@ -53,14 +53,14 @@ de..............................................................................
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-dcccccche........dhcccccccccccccccccccccccccccccccccccccccccccccccccccccche........dhcccccce
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diff --git a/data/levels/level002.gnl b/data/levels/level002.gnl
index a42fe7e..dca91d7 100644
--- a/data/levels/level002.gnl
+++ b/data/levels/level002.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level003.gnl b/data/levels/level003.gnl
index 6812f83..89e1ccd 100644
--- a/data/levels/level003.gnl
+++ b/data/levels/level003.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level004.gnl b/data/levels/level004.gnl
index 4a358d5..3c2e142 100644
--- a/data/levels/level004.gnl
+++ b/data/levels/level004.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level005.gnl b/data/levels/level005.gnl
index f037546..bb027dc 100644
--- a/data/levels/level005.gnl
+++ b/data/levels/level005.gnl
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diff --git a/data/levels/level006.gnl b/data/levels/level006.gnl
index 17907e3..59d88c7 100644
--- a/data/levels/level006.gnl
+++ b/data/levels/level006.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level007.gnl b/data/levels/level007.gnl
index 6453f76..0eb3a33 100644
--- a/data/levels/level007.gnl
+++ b/data/levels/level007.gnl
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diff --git a/data/levels/level008.gnl b/data/levels/level008.gnl
index d1a46bd..676954c 100644
--- a/data/levels/level008.gnl
+++ b/data/levels/level008.gnl
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diff --git a/data/levels/level009.gnl b/data/levels/level009.gnl
index 03946ab..db815c9 100644
--- a/data/levels/level009.gnl
+++ b/data/levels/level009.gnl
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diff --git a/data/levels/level010.gnl b/data/levels/level010.gnl
index 55095cf..ce26fa4 100644
--- a/data/levels/level010.gnl
+++ b/data/levels/level010.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level011.gnl b/data/levels/level011.gnl
index 2acc508..8993197 100644
--- a/data/levels/level011.gnl
+++ b/data/levels/level011.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level012.gnl b/data/levels/level012.gnl
index 996ad0e..0da8c90 100644
--- a/data/levels/level012.gnl
+++ b/data/levels/level012.gnl
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diff --git a/data/levels/level013.gnl b/data/levels/level013.gnl
index a7c4290..96943df 100644
--- a/data/levels/level013.gnl
+++ b/data/levels/level013.gnl
@@ -1,66 +1,66 @@
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+┃..........................................................................................┃
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diff --git a/data/levels/level014.gnl b/data/levels/level014.gnl
index 1d226d8..6232012 100644
--- a/data/levels/level014.gnl
+++ b/data/levels/level014.gnl
@@ -1,66 +1,66 @@
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+┃.........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛.........┃
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+┃........┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛........┃
+┃.........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛.........┃
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+┃........┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛........┃
+┃.........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛.........┃
+┃..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┃
+┃...........┗╋╋┛............┗╋╋┛............┗╋╋┛............┗╋╋┛............┗╋╋┛...........┃
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+┃.......┏┓........┏┓....┏┓........┏┓....┏┓........┏┓....┏┓........┏┓....┏┓........┏┓.......┃
+┃.......┗╋┓......┏╋┛....┗╋┓......┏╋┛....┗╋┓......┏╋┛....┗╋┓......┏╋┛....┗╋┓......┏╋┛.......┃
+┃........┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛........┃
+┃.........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛.........┃
+┃..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┃
+┃...........┗╋╋┛............┗╋╋┛............┗╋╋┛............┗╋╋┛............┗╋╋┛...........┃
+┃............┗┛..............┗┛..............┗┛..............┗┛..............┗┛............┃
+┃..........................................................................................┃
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+┃.......┏┓........┏┓....┏┓........┏┓....┏┓........┏┓....┏┓........┏┓....┏┓........┏┓.......┃
+┃.......┗╋┓......┏╋┛....┗╋┓......┏╋┛....┗╋┓......┏╋┛....┗╋┓......┏╋┛....┗╋┓......┏╋┛.......┃
+┃........┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛......┗╋┓....┏╋┛........┃
+┃.........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛........┗╋┓..┏╋┛.........┃
+┃...m......┗╋┓┏╋┛..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┗╋┓┏╋┛..........┗╋┓┏╋┛......m...┃
+┃...........┗╋╋┛............┗╋╋┛............┗╋╋┛.....m......┗╋╋┛............┗╋╋┛...........┃
+┃............┗┛..............┗┛..............┗┛..............┗┛..............┗┛............┃
+┃..........................................................................................┃
+┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
diff --git a/data/levels/level015.gnl b/data/levels/level015.gnl
index eb7b293..8ded5f4 100644
--- a/data/levels/level015.gnl
+++ b/data/levels/level015.gnl
@@ -1,66 +1,66 @@
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-bfle.......................fle...............m................dlg.......................dlgb
-ile.......................fle..................................dlg.......................dlj
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+┃..........┏╋┛.......................┏╋┛............┗╋┓.......................┗╋┓..........┃
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+┃........┏╋┛.......................┏╋┛................┗╋┓.......................┗╋┓........┃
+┃...m...┏╋┛.......................┏╋┛..................┗╋┓.......................┗╋┓...m...┃
+┃......┏╋┛.......................┏╋┛....................┗╋┓.......................┗╋┓......┃
+┃.....┏╋┛.......................┏╋┛......................┗╋┓.......................┗╋┓.....┃
+┃....┏╋┛.......................┏╋┛........................┗╋┓.......................┗╋┓....┃
+┃...┏╋┛.......................┏╋┛..........................┗╋┓.......................┗╋┓...┃
+┃..┏╋┛.......................┏╋┛............................┗╋┓.......................┗╋┓..┃
+┃.┏╋┛.......................┏╋┛..............................┗╋┓.......................┗╋┓.┃
+┃┏╋┛.......................┏╋┛...............m................┗╋┓.......................┗╋┓┃
+┣╋┛.......................┏╋┛..................................┗╋┓.......................┗╋┫
+┗┻━━━━━━━━━━━━━━━━━━━━━━━━┻┻━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┻┻━━━━━━━━━━━━━━━━━━━━━━━━┻┛
diff --git a/data/levels/level016.gnl b/data/levels/level016.gnl
index 485e860..de75b4e 100644
--- a/data/levels/level016.gnl
+++ b/data/levels/level016.gnl
@@ -1,66 +1,66 @@
-....fccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccg
-....dccccccccccccccccccccccccccccccccccccccccgfcccccccccccccccccccccccccccccccccccccccccccce
-.............................................bb.............................................
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-.....p.......................................bb.......................................n.....
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-dccccccccccccccccccccccccccccccccccccgb......bb......bfcccccccccccccccccccccccccccccccce....
-.....................................bb......bb......bb.....................................
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-....dcccccccccccccccccccccccccgb.....bb......bb......bb.....bfccccccccccccccccccccccccccccce
-..............................bb.....bb......bb......bb.....bb..............................
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-dccccccccccccccccccccccgb.....bb.....bb......bb......bb.....bb.....bfcccccccccccccccccce....
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-.......................bb.....bb.....bb......bb......bb.....bb.....bb.......................
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-....dcccccccccccgb.....bb.....bb.....bb......bb......bb.....bb.....bb.....bfccccccccccccccce
-................bb.....de.....bb.....de......de......bb.....de.....bb.....de................
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-................bb............bb.........o...........bb..m.........bb.......................
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-....dcccccccccccce.....bb.....bb.....bb......bb......bb.....bb.....bb.....dcccccccccccccccce
-.......................bb.....bb.....bb......bb......bb.....bb.....bb.......................
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-dccccccccccccccccccccccce.....bb.....bb......bb......bb.....bb.....dccccccccccccccccccce....
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-....fccccccccccccccccccccccccceb.....bb......bb......bb.....bdcccccccccccccccccccccccccccccg
-....dcccccccccccccccccccccccccce.....bb......bb......bb.....dcccccccccccccccccccccccccccccce
-.....................................bb......bb......bb.....................................
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-fcccccccccccccccccccccccccccccccccccceb......bb......bdccccccccccccccccccccccccccccccccg....
-dccccccccccccccccccccccccccccccccccccce......bb......dccccccccccccccccccccccccccccccccce....
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-....fccccccccccccccccccccccccccccccccccccccccedccccccccccccccccccccccccccccccccccccccccccccg
-....dcccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccce
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+.............................................┃┃.............................................
+.............................................┃┃.............................................
+.....p.......................................┃┃.......................................n.....
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diff --git a/data/levels/level017.gnl b/data/levels/level017.gnl
index e5f5db3..04fe1af 100644
--- a/data/levels/level017.gnl
+++ b/data/levels/level017.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level018.gnl b/data/levels/level018.gnl
index 5c7d2a5..7fe169c 100644
--- a/data/levels/level018.gnl
+++ b/data/levels/level018.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level019.gnl b/data/levels/level019.gnl
index 64abd3e..bc936da 100644
--- a/data/levels/level019.gnl
+++ b/data/levels/level019.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level020.gnl b/data/levels/level020.gnl
index 58cca3a..ed88d5c 100644
--- a/data/levels/level020.gnl
+++ b/data/levels/level020.gnl
@@ -1,66 +1,66 @@
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+.................................┃┃....┃┃....┃┃....┃┃....┃┃.................................
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+...........................┃┃....┃┃....┃┃....┃┃....┃┃....┃┃....┃┃...........................
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+...........................┃┃....┃┃....┃┃....┃┃....┃┃....┃┃....┃┃...........................
+.....................┏┓....┃┃....┃┃....┃┃....┃┃....┃┃....┃┃....┃┃....┏┓.....................
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+.....................┃┃....┃┃....┃┃....┃┃....┃┃....┃┃.m..┃┃....┃┃....┃┃.....................
+.....................┃┃....┃┃....┃┃....┃┃....┃┃....┃┃....┃┃....┃┃....┃┃.....................
diff --git a/data/levels/level021.gnl b/data/levels/level021.gnl
index f9877a4..43a1384 100644
--- a/data/levels/level021.gnl
+++ b/data/levels/level021.gnl
@@ -1,66 +1,66 @@
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+┃..........................................................................................┃
+┃..........................................................................................┃
+┃..........................................................................................┃
+┃..........................................................................................┃
+┃..........................................................................................┃
+┃..........................................................................................┃
+┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
diff --git a/data/levels/level022.gnl b/data/levels/level022.gnl
index 7501035..2afa2af 100644
--- a/data/levels/level022.gnl
+++ b/data/levels/level022.gnl
@@ -1,66 +1,66 @@
-fccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccg
-b..........................................................................................b
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-b..........................................................................................b
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diff --git a/data/levels/level023.gnl b/data/levels/level023.gnl
index 5f6b138..9580a83 100644
--- a/data/levels/level023.gnl
+++ b/data/levels/level023.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level024.gnl b/data/levels/level024.gnl
index ec92f43..7c6a974 100644
--- a/data/levels/level024.gnl
+++ b/data/levels/level024.gnl
@@ -1,33 +1,33 @@
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diff --git a/data/levels/level025.gnl b/data/levels/level025.gnl
index 301c2a1..836bf39 100644
--- a/data/levels/level025.gnl
+++ b/data/levels/level025.gnl
@@ -1,66 +1,66 @@
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diff --git a/data/levels/level026.gnl b/data/levels/level026.gnl
index d83364e..8f10fa4 100644
--- a/data/levels/level026.gnl
+++ b/data/levels/level026.gnl
@@ -1,66 +1,66 @@
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-b...........................................b..b...........................................b
-ig..fg......................................b..b......................................fg..fj
-de..dhcccccccccccccccccccccccccccccccccccccce..dcccccccccccccccccccccccccccccccccccccche..de
+┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳┓..┏┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+┃..........................................┗┛..┗┛..........................................┃
+┃..........................................................................................┃
+┃..........................................................................................┃
+┃..........................................┏┓..┏┓..........................................┃
+┃....p.....................................┗┫..┣┛.....................................n....┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃....p......................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃......................................n....┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┣┓..┏┓......................................┃..┃......................................┏┓..┏┫
+┗┛..┗┻━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛..┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┻┛..┗┛
 ............................................................................................
 ............................................................................................
-fg..fkccccccccccccccccccccccccccccccccccccccg..fcccccccccccccccccccccccccccccccccccccckg..fg
-ie..de......................................b..b......................................de..dj
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b...........................................b..b...........................................b
-b....p.....................................fj..ig.....................................n....b
-b..........................................de..de..........................................b
-b..........................................................................................b
-b..........................................................................................b
-b..........................................fg..fg..........................................b
-dcccccccccccccccccccccccccccccccccccccccccche..dhcccccccccccccccccccccccccccccccccccccccccce
+┏┓..┏┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓..┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳┓..┏┓
+┣┛..┗┛......................................┃..┃......................................┗┛..┗┫
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃...........................................┃..┃...........................................┃
+┃....p.....................................┏┫..┣┓.....................................n....┃
+┃..........................................┗┛..┗┛..........................................┃
+┃..........................................................................................┃
+┃..........................................................................................┃
+┃..........................................┏┓..┏┓..........................................┃
+┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┻┛..┗┻━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
diff --git a/src/nibbles-game.vala b/src/nibbles-game.vala
index 5ed03ef..e49d1cb 100644
--- a/src/nibbles-game.vala
+++ b/src/nibbles-game.vala
@@ -105,19 +105,56 @@ private class NibblesGame : Object
         for (int i = 0; i < NibblesGame.HEIGHT; i++)
         {
             tmpboard = future_board [i];
-            if (tmpboard.length != NibblesGame.WIDTH)
+            if (tmpboard.char_count () != NibblesGame.WIDTH)
                 return false;
             for (int j = 0; j < NibblesGame.WIDTH; j++)
             {
-                board[j, i] = tmpboard.@get(j);
-                switch (board[j, i])
+                unichar char_value = tmpboard.get_char (tmpboard.index_of_nth_char (j));
+                switch (char_value)
                 {
-                    case '.': // readable empty space, but the game internals uses 'a'
-                        board[j, i] = 'a';
+                    // readable empty tile, but the game internals use an 'a'
+                    case '.':
+                        board[j, i] = (int) 'a';
                         break;
 
+                    // readable walls, but the game internals use ASCII chars
+                    case '┃':
+                        board[j, i] = (int) 'b';
+                        break;
+                    case '━':
+                        board[j, i] = (int) 'c';
+                        break;
+                    case '┗':
+                        board[j, i] = (int) 'd';
+                        break;
+                    case '┛':
+                        board[j, i] = (int) 'e';
+                        break;
+                    case '┏':
+                        board[j, i] = (int) 'f';
+                        break;
+                    case '┓':
+                        board[j, i] = (int) 'g';
+                        break;
+                    case '┻':
+                        board[j, i] = (int) 'h';
+                        break;
+                    case '┣':
+                        board[j, i] = (int) 'i';
+                        break;
+                    case '┫':
+                        board[j, i] = (int) 'j';
+                        break;
+                    case '┳':
+                        board[j, i] = (int) 'k';
+                        break;
+                    case '╋':
+                        board[j, i] = (int) 'l';
+                        break;
+
+                    // start positions
                     case 'm':
-                        board[j, i] = NibblesGame.EMPTYCHAR;
+                        board[j, i] = (int) NibblesGame.EMPTYCHAR;
                         if (count < numworms)
                         {
                             worms[count].set_start (j, i, WormDirection.UP);
@@ -125,7 +162,7 @@ private class NibblesGame : Object
                         }
                         break;
                     case 'n':
-                        board[j, i] = NibblesGame.EMPTYCHAR;
+                        board[j, i] = (int) NibblesGame.EMPTYCHAR;
                         if (count < numworms)
                         {
                             worms[count].set_start (j, i, WormDirection.LEFT);
@@ -133,7 +170,7 @@ private class NibblesGame : Object
                         }
                         break;
                     case 'o':
-                        board[j, i] = NibblesGame.EMPTYCHAR;
+                        board[j, i] = (int) NibblesGame.EMPTYCHAR;
                         if (count < numworms)
                         {
                             worms[count].set_start (j, i, WormDirection.DOWN);
@@ -141,7 +178,7 @@ private class NibblesGame : Object
                         }
                         break;
                     case 'p':
-                        board[j, i] = NibblesGame.EMPTYCHAR;
+                        board[j, i] = (int) NibblesGame.EMPTYCHAR;
                         if (count < numworms)
                         {
                             worms[count].set_start (j, i, WormDirection.RIGHT);
@@ -149,6 +186,7 @@ private class NibblesGame : Object
                         }
                         break;
 
+                    // warps
                     case 'Q':
                     case 'R':
                     case 'S':
@@ -159,6 +197,7 @@ private class NibblesGame : Object
                     case 'X':
                     case 'Y':
                     case 'Z':
+                        board[j, i] = (int) char_value;
                         warp_manager.add_warp (board, j - 1, i - 1, -(board[j, i]), 0);
                         break;
 
@@ -171,12 +210,28 @@ private class NibblesGame : Object
                     case 'x':
                     case 'y':
                     case 'z':
-                        warp_manager.add_warp (board, -(board[j, i] - 'a' + 'A'), 0, j, i);
-                        board[j, i] = NibblesGame.EMPTYCHAR;
+                        warp_manager.add_warp (board, -(((int) char_value) - 'a' + 'A'), 0, j, i);
+                        board[j, i] = (int) NibblesGame.EMPTYCHAR;
+                        break;
+
+                    // old walls, kept for compatibility
+                    case 'a':
+                    case 'b':
+                    case 'c':
+                    case 'd':
+                    case 'e':
+                    case 'f':
+                    case 'g':
+                    case 'h':
+                    case 'i':
+                    case 'j':
+                    case 'k':
+                    case 'l':
+                        board[j, i] = (int) char_value;
                         break;
 
                     default:
-                        break;  // return false?
+                        return false;
                 }
             }
         }
diff --git a/src/nibbles-test.vala b/src/nibbles-test.vala
index c3b66f1..019241f 100644
--- a/src/nibbles-test.vala
+++ b/src/nibbles-test.vala
@@ -84,71 +84,71 @@ namespace NibblesTest
     }
 
     private const string [] level_008 = {
-            "fccccccccccccccccccccccccccccccccccccccce........dcccccccccccccccccccccccccccccccccccccccccg",
-            "b..........................................................................................b",
-            "b..........................................................................................b",
-            "b..........................................................................................b",
-            "b...R...............................fg...........................fg.....................S..b",
-            "b...u...............................dlg..........................bb....................t...b",
-            "b....................................dlg.........................bb........................b",
-            "b...........fg........................dlg........................bb........................b",
-            "b...........bb.........................dlg.......................bb........................b",
-            "b...o.......bb..........................dlg......................bb........................b",
-            "b...........bb...........................dlg.....................bb...fccccccccg...........b",
-            "b...........bb............................dlg....................bb...dcccccccclg..........b",
-            "b...........bb.............................dlg...................bb............dlg.........b",
-            "b...........bb..............................dlg..................bb.............dlg........b",
-            "b...........bb............fg.................dlg.................bb..............dlccg.....b",
-            "b...........bb...........fle..................dlg................bb...............dcce.....b",
-            "b...........bb..........fle....................dlg...............bb........................b",
-            "e...........de.........fle......................dlg..............bb........................d",
-            "......................fle........................dlg.............bb.........................",
-            ".....................fle.........................fle.............bb.........................",
-            "....................fle.........................fle..............bb.........................",
-            "...................fle.........................fle...............bb.........................",
-            "..................fle.........................fle................bb......fg.................",
-            "..................de.........................fle.................bb......dlg................",
-            "............................................fle..................bb.......dlg...............",
-            "............................................dlg..................bb........dlg..............",
-            "g.................o..........................dlg.................bb.........dlg............f",
-            "b.............................................dlg................bb..........dlg...........b",
-            "b..............................................dlg...............bb...........dlg..........b",
-            "b........fg.....................fg..............dlg..............bb............de..........b",
-            "b........bb.....................dlg..............dlg.............bb........................b",
-            "b........bb......................dlg..............dlg............bb........................b",
-            "b........bb.......................dlg..............dlg...........bb........................b",
-            "b........bb........................dlg..............de...........bb........................b",
-            "b........bb.........................dlg..........................bb........................b",
-            "b........bdcccccccg..................dlg.........................bb........................b",
-            "b........dcccccccce...................dlg........................bb........................b",
-            "b......................................dlg.......................bb........................b",
-            "b.......................................dlg......................bb....fcccccccccccccg.....b",
-            "b...p....................................dlg.....................bb....dccccccccccccce.....b",
-            "b........................................fle.....................bb........................b",
-            "b.......................................fle......................bb........................b",
-            "b.................fg...................fle.......................bb........................b",
-            "b.................bb..................fle........................bb........................b",
-            "b...........fg....bb.................fle.........................bb........................b",
-            "b..........fle....bb................fle..........................bb........................b",
-            "b.........fle.....bb...............fle...........................bb........................b",
-            "b........fle......bb...............de............................bb........................b",
-            "b.......fle.......bb.............................................bb........................b",
-            "b......fle........bb.............................................bb........................b",
-            "b......de.........bb...............................m.............bb........................b",
-            "b.................bb.............................................bb........................b",
-            "b.................bb.............................................bb........................b",
-            "b.................bb.............................................bdcccccccccccccg..........b",
-            "b.................bb............fccccccccccccccccccccccg.........dcccccccccccccce..........b",
-            "b.................bb............dcccccccccccccccccccccce...................................b",
-            "b.................bb.......................................................................b",
-            "b.................bb...................................................................n...b",
-            "b.................bb.......................................................................b",
-            "b.................bb......................n................................................b",
-            "b...s.............bb...................................................................r...b",
-            "b.................de.......................................................................b",
-            "b...T...................................................................................U..b",
-            "b..........................................................................................b",
-            "b..........................................................................................b",
-            "dcccccccccccccccccccccccccccccccccccccccg........fccccccccccccccccccccccccccccccccccccccccce"
+            "┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛........┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓",
+            "┃..........................................................................................┃",
+            "┃..........................................................................................┃",
+            "┃..........................................................................................┃",
+            "┃...R...............................┏┓...........................┏┓.....................S..┃",
+            "┃...u...............................┗╋┓..........................┃┃....................t...┃",
+            "┃....................................┗╋┓.........................┃┃........................┃",
+            "┃...........┏┓........................┗╋┓........................┃┃........................┃",
+            "┃...........┃┃.........................┗╋┓.......................┃┃........................┃",
+            "┃...o.......┃┃..........................┗╋┓......................┃┃........................┃",
+            "┃...........┃┃...........................┗╋┓.....................┃┃...┏━━━━━━━━┓...........┃",
+            "┃...........┃┃............................┗╋┓....................┃┃...┗━━━━━━━━╋┓..........┃",
+            "┃...........┃┃.............................┗╋┓...................┃┃............┗╋┓.........┃",
+            "┃...........┃┃..............................┗╋┓..................┃┃.............┗╋┓........┃",
+            "┃...........┃┃............┏┓.................┗╋┓.................┃┃..............┗╋━━┓.....┃",
+            "┃...........┃┃...........┏╋┛..................┗╋┓................┃┃...............┗━━┛.....┃",
+            "┃...........┃┃..........┏╋┛....................┗╋┓...............┃┃........................┃",
+            "┛...........┗┛.........┏╋┛......................┗╋┓..............┃┃........................┗",
+            "......................┏╋┛........................┗╋┓.............┃┃.........................",
+            ".....................┏╋┛.........................┏╋┛.............┃┃.........................",
+            "....................┏╋┛.........................┏╋┛..............┃┃.........................",
+            "...................┏╋┛.........................┏╋┛...............┃┃.........................",
+            "..................┏╋┛.........................┏╋┛................┃┃......┏┓.................",
+            "..................┗┛.........................┏╋┛.................┃┃......┗╋┓................",
+            "............................................┏╋┛..................┃┃.......┗╋┓...............",
+            "............................................┗╋┓..................┃┃........┗╋┓..............",
+            "┓.................o..........................┗╋┓.................┃┃.........┗╋┓............┏",
+            "┃.............................................┗╋┓................┃┃..........┗╋┓...........┃",
+            "┃..............................................┗╋┓...............┃┃...........┗╋┓..........┃",
+            "┃........┏┓.....................┏┓..............┗╋┓..............┃┃............┗┛..........┃",
+            "┃........┃┃.....................┗╋┓..............┗╋┓.............┃┃........................┃",
+            "┃........┃┃......................┗╋┓..............┗╋┓............┃┃........................┃",
+            "┃........┃┃.......................┗╋┓..............┗╋┓...........┃┃........................┃",
+            "┃........┃┃........................┗╋┓..............┗┛...........┃┃........................┃",
+            "┃........┃┃.........................┗╋┓..........................┃┃........................┃",
+            "┃........┃┗━━━━━━━┓..................┗╋┓.........................┃┃........................┃",
+            "┃........┗━━━━━━━━┛...................┗╋┓........................┃┃........................┃",
+            "┃......................................┗╋┓.......................┃┃........................┃",
+            "┃.......................................┗╋┓......................┃┃....┏━━━━━━━━━━━━━┓.....┃",
+            "┃...p....................................┗╋┓.....................┃┃....┗━━━━━━━━━━━━━┛.....┃",
+            "┃........................................┏╋┛.....................┃┃........................┃",
+            "┃.......................................┏╋┛......................┃┃........................┃",
+            "┃.................┏┓...................┏╋┛.......................┃┃........................┃",
+            "┃.................┃┃..................┏╋┛........................┃┃........................┃",
+            "┃...........┏┓....┃┃.................┏╋┛.........................┃┃........................┃",
+            "┃..........┏╋┛....┃┃................┏╋┛..........................┃┃........................┃",
+            "┃.........┏╋┛.....┃┃...............┏╋┛...........................┃┃........................┃",
+            "┃........┏╋┛......┃┃...............┗┛............................┃┃........................┃",
+            "┃.......┏╋┛.......┃┃.............................................┃┃........................┃",
+            "┃......┏╋┛........┃┃.............................................┃┃........................┃",
+            "┃......┗┛.........┃┃...............................m.............┃┃........................┃",
+            "┃.................┃┃.............................................┃┃........................┃",
+            "┃.................┃┃.............................................┃┃........................┃",
+            "┃.................┃┃.............................................┃┗━━━━━━━━━━━━━┓..........┃",
+            "┃.................┃┃............┏━━━━━━━━━━━━━━━━━━━━━━┓.........┗━━━━━━━━━━━━━━┛..........┃",
+            "┃.................┃┃............┗━━━━━━━━━━━━━━━━━━━━━━┛...................................┃",
+            "┃.................┃┃.......................................................................┃",
+            "┃.................┃┃...................................................................n...┃",
+            "┃.................┃┃.......................................................................┃",
+            "┃.................┃┃......................n................................................┃",
+            "┃...s.............┃┃...................................................................r...┃",
+            "┃.................┗┛.......................................................................┃",
+            "┃...T...................................................................................U..┃",
+            "┃..........................................................................................┃",
+            "┃..........................................................................................┃",
+            "┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓........┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛"
         };
 }
diff --git a/src/nibbles-view.vala b/src/nibbles-view.vala
index 2abaf84..60c876d 100644
--- a/src/nibbles-view.vala
+++ b/src/nibbles-view.vala
@@ -313,7 +313,6 @@ private class NibblesView : GtkClutter.Embed
                         case 'x':
                         case 'y':
                         case 'z':
-                        case '.': // empty space in files, replaced by an 'a'
                             assert_not_reached ();
 
                         case 'Q':