Hmm. Game just freezes in a save loop right when you get to the 2nd magic point. Shame. Looked nice, even if veeery clunky.
Regarding Gamma: you can press F5 to see the shaders. It's not pretty but you can get around. F4 to get back.
EDIT: launched the game again - the save seems to work. BUT....
Found the AZ stone, the objective, and then you have to backpeddle all the way? Anyway, there is no save function, I died on my way back on one of those traps and it reloaded me back before I got the stone and solved all the puzzles... frustrating.
Not to mention: there were ZERO scenes so far. Only hare bare ass, but nothing more. Skip. Next.