As the doorman to a spiffy and very classy hotel, it's up to you to prevent peasants and other rabble from encroaching on your fine establishment. So when Zombies turn up looking to party in the penthouse, it's up to you to make sure they never make it that high!
fire : left_mouse
jump : na
movement : wasd
Mouse to aim, click to fire,
Arrow keys to swap sides of the hotel.