Something that would help this game considerably, would be the occasional decrease in the enemy spawn rate, because once you hit a certain point in the game, you'll wind up with a constant barrage of giant grunts, which will block your attack from reaching the much more devastating enemies that are also chasing you around.
More more more! please add more to this wonderful game, and maybe finish the stairstepper level in the lair just so we can get all gold doors. please?
Either way amazing game, keep it up, an tell your prof that kongregate thinks you deserve top marks.