Ahh, what a brilliant game for such a short time limit! I loved the graphic style and the concept of the game. One of the best "damage-linked-to-health" games I've seen so far.
My only concern is the sluggish gameplay, because a lot of the time spent on each level is just hit-n-running, waiting for your hp to recover. By making the game a bit more fast-paced, juicy, and some more levels+enemies, this could be a real game in the app store.
Fantastic job overall!