If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Fight Back against the Zombie Apocalypse! They want Brains? Feet? Torsos? No Problem! Silly Zombies don't know you Poisoned their Tasty Cadaver Treats! You're gonna Save this Town if you've gotta Chainsaw every non-Zombie Corpse to do it!!