Unforgiving but good.
In my opinion you made a great game, even though I never managed to finish it.
The difficulty curve beyond the first act was insane. At least to me, who isn't used to this sort of platformers. Specifically the bouncing off walls parts had me wondering if the game was brocken, since more then often I flew over ledges I wanted to land on and simply slided down walls I wanted to jump off.
Oh, and don't get me started on the time based stuff! Falling down somewhere because you weren't sure what you were supposed to do next is a definitiv NoNo
Nether the less, you made a stylish, interesting platformer with nice music.
It reminded me of Prince of Persia! In a good way!
I only beg you to consider the n00bs next time.