This game is really good. The gun upgrade system is very nice, and my only real gripes are that it gets way too hard way too fast and the enemies are pretty hard to hit because they're too skinny. Other than that, its pretty good 4/5
This game has a lot of potential. The auto firing kills it because it seems like it takes away from the fun if you're just watching a guy shoot instead of shooting zombies yourself. You should also be able to choose the weapons for your sidekicks. They usually get pistols and then you change it again so they have better guns, but then you're stuck with the sucky ones and this repeats. So basically, take out the auto fire and the randomness when getting weapons and this would be a great game!