Zombie Mode

A screenshot

Zombie Mode is a mode in which you can use the Zombies. You must use Zombie Gravestones to get Brains which are used to buy Zombies. You can get stuff for it at Dr. Zomboss's Experiments. You start off with weak zombies like Boxhead Zombies but later get stronger ones like Footballoon Zombie. The first level only has Closed Mouth Peas but plants get stronger later. you can also get zombies for your Zombie Graveyard and Aquatic graveyard by eating plants