fun for a few levels, but after you get the 2 top guns, everything else is mute. the zombies never reach the house and upgrading accuracy seems to do little if nothing at all. the game really hates if you try to switch between your 2 weapons, so found it necessary to unload 1 completely. major lag as well, so just click like crazy, no skill involved. dont really enjoy the globular angle as its near impossible to judge which zombie is closest, the way they layer when they get close is also problematic (doubling or tripling over each other)