Brilliant!
Alright. Let's break down this wicked awesome game.
Graphics. My God, this was probably the best part. Well... No. But it was still awesome! Very detailed. Things are very clearly defined. Very, very appealing.
Style. I've been a fan of defense games for quite some time. But this just takes the cake. VERY REALISTIC! Moving around makes your aiming different even if your crosshair is in the same place. Nice touch, in my opinion. Plus, the weapon-find-o-meter was a good addition. Buying weapons didn't make sense since you're stranded n' all. Good system.
Sound. Really good. Really seems like a shotgun was fired off somewhere in my house. Then again, my speakers tend to do that a lot. Really good. Can't complain in the slightest.
Violence. Perfect blend of violence. Rupturing blood, but not overly gruesome like some other shooters.
Interactivity! The pinnacle of this game's aspects. Weapon range is great. Automatic weapons, pistols, shotguns, a chainsaw, and a very special overkill weapon. But that's not even half of it. If I go on any longer, it'd be morning before I could type the last word describing how awesome it is.
Humor. Hrm, not much there. Aside from the slightly amusing sticky notes, I guess you could laught at shooting heads off. Of course, I'm not that morbid.
Overall, this was your first flash game. And if it's that damn good, I'll be awaiting a sequel.