I Think It Like GTA4 It Have A gun
You have got alot of opportunity to expand on this game and make it really good, raise the difficulty maybe and make some items to be picked up. Look to GTA1 for ideas.
awesome game! kinda hard though.
Fun to play, you made it right, but the only thing you should fix, is that sometimes you respawn over the zombies-red squares-whatever, and it is annoying. But anyway you deserve a 9 sir.