I like it! The game feels good; the attack makes a sound, a particle effect, and hit enemies flash red. The only thing that lacks are particles flying out, but the game's still fun to play withouth that.
I feel kinda weird about the whole "weaker = more points"; while it's a subversion and all that, players like being strong, specially in a shooter game like this. Making so the most fun way of playing the game is also the less effective for getting points is kinda weird, in my opinion.
That aside, I really like everything else; the character customization, the art, etc. Pretty well-made game!