Logo: fresh look, I like it. However, it looks slightly distorted
to me,
if it is supposed to resemble a perfect cube. As you know, all
parallel
lines in a perspective projection share a common vanishing point.
This
seems not to be the case particularly in the upper and lower edges of
the green front face and the corresponding edges in the back. Also,
you
might want to consider to make the 'invisible' edges not as heavy
as the
others; I suggest to have a little of the face colour mixed in them
to
give them a shine-through appearance.