(It's my first clicker game with upgrades, so sorry if you can't buy more than one upgrade.) More updates coming! So, while Dr. Zomboss and his zombies were walking in the neighborhood, they found a big brain in Crazy Dave's lawn. They didn't know where it came from, but obviously, Crazy Dave wouldn't be crazy enough to throw a brain in his lawn. But Dr. Zomboss wouldn't waste it (of course), so you, as a Browncoat Zombie need to eat brains to call your friends and etc.
For these who are bored, here are some cheat codes, when you click in one of the red dots in the lawn: BRAINZ!!!: Give you 900000000 brains. I hate brains!: Remove 900000000 brains of you. DS Zombie: Give you a secret slot to call the DS Zombie. BUY!!!: Unlock all zombies.