Fun:
The game is kind of hard to get into, I'm happy it starts out with WASD as it makes starting the game really easy. However, I'd maybe suggest swapping them out bit by bit instead of all at once.
At the beginning it also wasn't clear how I got score, but I found out by accident when I exploded an enemy, no idea if that's on purpose or not. The fun of the game is found in the idea of it instead of the execution as it isn't as pressuring to find the right keys, at least at the beginning.
Originality:
Ok, so I've not seen anything like this, specifically. I've seen people swap controls, and others some some funky stuff with the screen but this mind twister of a game is very very original.
Presentation:
I. Love. The. Art. (And music, good stuff)
Overall:
Hmm? oh sorry, I was too busy trying combWASDion again.
P.S. I love the pun.