Artdirection is fantastic!
The way taking damage in the game works is interesting because with current spawnrates it's pretty much impossible to keep enemies from overwhelming you after taking 1 or 2 hits. But since you yourself become smaller it's easier for you to dodge enemies and survive. I think this kind of dynamic can work great in the game where you only have to survive for a fixed amount of time - you spent half the level clearing the battlefield then took damage and then spent another half a level running and scrambling for your life.
Great job!