Upgrade cost cog.. but if I have a lot of cog I can't upgrade.. just when I level up.. so why I need to level up? and I die after 10 shot.. need more hp or a repair function.. 3/5
boring.. cuz no shop no turret or something.. you only have to click on the police unit and near the zombies.. but if there a lot of them you can't do anything with 3 squad. 3/5