Place defensive towers on the grassy areas to stop invading monkeys, blobs, starlings and other crazed creatures. Just like other tower defense games, you can upgrade and sell your towers. The enemies will shoot at towers so you must use the repair tool to prevent them from being destroyed. Other items include exploding snacks which can be placed on the path and bombs which can be dropped on enemies. You can upgrade one of these items at the end of each round. There are a total of 15 rounds.