Very cool gameplay idea, however, the level design is flawed..
Only having one hero to fight vs multiple enemies means that I'll have to do multiple attack+retreat tactics. I managed to get to Level 3 using boring hit & hope tactics from a hidden place, but Level 3 was too much, because enemies would reach me before I could manage to do anything. and after that there was no escape.
Still, I loved the idea -- worm's like gameplay.. also the UI was very good!
Good job on doing this in such a short time!