This game is really good but it can be better with a few updates that improve : Graphics, bigger maps, more map varieties, more gun varieties, things like ammo crates and other things that you can collect around the map like grenades that you can throw at the zombies and other stuff too, more difficulties, campaign modes ( and other modes too), multiplayer, and music. I feel like this game can be one of the best game in the Apple Store if all of these things are added to the game. I see a lot of potential that everyone will like this game.