Something has gone terribly wrong. Your orders: stop the spread of the zombie apocalypse. With your trusty saw-blade and paddles, survive on your own or with the help of a friend through endless waves of zombies. Collect awesome powerups. Get combos. Get a high score. Make zombies go splat!
Hinting from "Play" menu that there is the ability to save and resume your game by showing a disabled version of the Resume button.