Zombies are roaming around the town spreading the zombie infection and moaning for brains, but don't worry, you don't have to hack their heads off anymore. A cure has been developed, and if you're brave enough to go out there and face the zombies, you can turn them all back into normal humans. Since you wouldn't want to get too close, start each level by finding the gun that will shoot the medicine at them from afar. Once you've got that, find all the zombies and heal them while you look for the key you'll need to exit the level and move on to the next set of zombies.