Interesting. Didn't finish it tho due to a bug.
If you back up to wall while holding a cube, the cube will appear above your head(?) or inside of you, not sure which, but if you release the cube in this state at a door it can go through the door. Also the sfx got really annoying, especially the seqCube(I think thats what it was called), sounded like an alarm clock.
Other than that good job!