Holy crap Gan, that is impressive.
Yeah, I've run into that before... didn't have time to fix it before the contest.
EDIT - on that note: anyone who plays this, please let me know if you find more bugs! I've run into the following:
The map generator will occasionally place enemies in impossible to reach areas.
Enemies will occasionally be able to hit you from a distance.
I've run into a crash bug once, never been able to reproduce it.