Nice game!
Fun and simple, yet challenging.
This is one of the few games I beat in my first try, and I think it's because of the few levels. This game has A LOT of potential. More levels, more enemies, maybe eating lypids or carbohidrates and that could have another purpose (like a power up?).
Also, I couldn't read what did each icon (power) do. You could have sort of a level for each ability where you explain how it works.
Anyways, pretty cool. Keep it up! :D