Solid work on the mechanics and puzzles!
I got stuck in a room tho with no way back - my cube was teleported far away after releasing it on the wall :( (this room where you have to stand on one of the switches). Restart button would be useful.
The switching between modes felt a bit weird but you can get used to it.
Also, graphics could use more love, but i get that it was not your main focus.
Very good entry!