This game was cool! I liked the core idea and how it connected to the theme. The controls were easy and intuitive enough, and I appreciated the thought to support WASD or arrow key controls. The aesthetics were great, the sounds were good, and the link to the theme was strong. It was a really great entry!
I don't have much by way of criticism. The one thing I'd note is that the advantages of being large so far outweigh the advantages of being small, to a point where the game is really easy for as long as you maintain high health. I wished that there was some redeeming quality to being small that made it less hopeless to fight back from.
Aside from that, it was great. Frenetic and fun. Great job!