Tap'em Dead. The world as you know it has been over run with zombies ALL TYPES OF ZOMBIES.
To survive you have to tap'em dead.
Look out for the loadout screen..it will help you with selecting your weapons as you earn them by progressing to the next stage.
Keywords: dead, zombie, zombies, zombie clown, zombie chicken, zombie ninja, zombie cyborg
Don't forget to play the spin off game Zombie Chicken.