Nice, but.
It was a good game. Well designed levels, guns, turrets, enemies.
But the only reason why I stopped playing was because a zombie managed to get himself so close to me that I couldn't shoot him. And, I was stuck in one spot so I couldn't move at all. By the time I had figured out where to aim to kill the bugger, one of the bigger zombies ate my head. Other than that, it's a good game.