That was unexpected... art style is nice, music pretty cool (even if it would turn me crazy after more than 10 minutes :)) and the idea to switch between different "weapons" depending on the flies you ate is just perfect!
Few points for improvement: we can get stuck in the thin platforms, when jumping through them, but not going high enough... And the lerp on the camera migh be too high: I once died in the swamp even before the camera was on it :)