As i love rage-'try again quick' games i really had fun playing it. Visuals are great, 'music' on the background doesn't get annoying at the mechanics adds an interesting puzzle side to the whole thing.
I couldn't finish it, i found a bit unfair to repeat the 'key' area if you die after that (maybe next one was the last area, so it is like a 'final boss').
PD: Found a small bug on the second area: if you move left back to the entrance, you fall down to the bottom of the scenary, and can still walk from there