Mass Mayhem - Zombie EXP

In Mass Mayhem we play as a cool colonel which stands alone in front of a zombie horde, but with nice toys. Not that we have a nice arsenal of weapons we also have a car and a Mech. We control him with the arrow keys and X also space. The only thing which is annoying is the slow movements in the game. Of course, there are upgrades after each round which we can access by clicking on our cash in the bottom right.