After making it to the 3rd stage, I had to give up. The concept is nice, but with the way the camera work I can no longer push through this game. Maybe instead of using the mouse, have the player turn the body with the A & D keys, while walking back and for with the W & S key. This would give the player 360 degree of turning.
Not entirely sure, but the symbols in stage three looked to be reversed (could be wrong). Also in stage 1, why did you make an entirely different room? The only things of note in there, was a hint, what looked to be a monster, and a dresser with glowing knobs that I could not get to do anything.
Best of luck with everything.