I totaly agree with Big2Bird! I really liked the movement and jump physics, had to get used to the camera tho. I wanted to play every level and collect every cookie, but after world 1 I realiesed I am not yet good enough :(.
I noticed that the sound of the engine (i think) is really aggresive on the speakers. I think one can fix that with lowering the base volume of the sound, so that it doesn't clip the speakers (at least that is how it is done in audacity ? ).
Overall a really fun and cool game!