The computer desk keeps bugging me. Since the bases and tops of things are all on the same line in this perspective, the only way to show that both the computer-desk-cabinets and the supporting plank are of equal width is to make the shadows of both have equal width. Right now, it looks like the supporting plank is either flat and somewhat turned to face the viewer, or it looks like it gets to the wall far before the cabinets do.
I tried it in paint, and the fix makes it much more readable. I'd post the edit, but I still fail at transparency.
These are adorable. I agree with Stratto, they look like they belong in a platformer, but the colors are also giving me a dollhouse vibe (in a good way).