Great zombie game.
Hey, great job with this. I really liked all the upgrades and stuff. But, like others have said, it gets boring too quickly. It's really easy to gain exp points with the M3 and the spaz once you have the overkill, once i had all the guns and upgrades, it just got boring. Try adding a cleanup upgrade, where you can clear the whole playfield of corpses and blood. It gets pretty annoying when your whole field is full of blood and the zombies just blend in. (And you can't do shit about it). Anyways. Pretty awesome flash game