Fun to play; more customization needed, though.
Though this game does resemble Thing Thing, the actual concept is quite remarkable and different. Because of the way your character flies away when hit with a bullet or grenade blast, it kind of reminds me of Super Smash Bros. Odd, eh?
I like how there are many modes of play. An interesting one is the Microphone Mode, where guns are triggered by blowing into a mic. You should really make a blowdart sort of game with this. It was generally fun to play, albeit with humorous AI troubles (sometimes, if you toss a grenade at your enemy, he will stand there and the grenade blows up in his face). :D
Some suggestions would be to add custom characters into the game. I wanted to rename 'Default' into something else, but I couldn't. I have no idea whether this was intentional or unexpected. Sure, customizing your character's skin and blood color was cool, but it could have been better. But, overall, this was fun to play, and it certainly has a chance to be on the front page.