Pretty cool game! I can feel the inspiration from "Shift" ;)
I suggest you add more easier/tutorial levels at the beginning to explain us the mechanics of the game. I didn't know I had to move right after rotating (while falling) in the second level :P
For those struggling with a level, spot all the flat surfaces and try to reach them all, one of them will lead to the right path.
And for those who keep rotating in the wrong way, the gravity will go in the direction the letter is; E is on the right, you'll fall to the right, Q is on the left, you'll fall to the left. These little tricks helped me complete the game ;)