God of Worms brings the top-down castle defense style game into a fantasy world of invading peanut/potato type creatures. The enemy will flood down the screen in hopes of taking out your precious guard wall. It is up to you to tap on them to grind them into the dirt and end their mad rush. These little guys come prepared though. Suits of armor, shields, various mounts, and big bad creatures all require differing amounts of tapping to send them back into the hell from which they came. You are not without your own special defense though, as you control fireballs, rain, pools of oil, and lightning as weapons.