You control a parasite the mean one.. ok not that mean. actually a bit cute. Each level theres a goal you must achieve from eating killing other parasite or sometimes save and fed some annoying amoeba. You got like 12 weapons to buy and 6 abilities with 5 level to upgrades more than 50+ achievements and more than 15 level and 20 minigames. Compete for highscore in the last level. Ok mind that numbers and grab your mouse to rules!