I got to the third set of stairs, then got stuck in a gap and quit. I plan to play more of it.
The design owes to Portal, and I really dig the ambience. I have always wanted the game that lets you explore Escher-like environments with odd physics. Antichamber was close but not quite. There was another 3D game that played with perspective in the sense of you initially think you're in a normal sized room, but as you walk it's a lot larger and a chair grows to the size of a mountain.
I like this sort of thing, so I appreciate your prototype a lot!