Use [ arrow keys ] or [ WASD ] to gobble up other micro-organisms. If you get stuck press [ M ] to return to the level select menu. If you eat enough, you will transform into a more beautiful version of yourself. (Check the green gauge at left.) Unfortunately, your petri dish is also occupied by a purple blob. He will gladly gobble the other available bugs before you get to them. And beware: he has two special tricks. He will hold you back if he catches you. And he can go through black barriers in later levels, whereas you must go around. Very unfair! Keep in mind that as you eat more you will also get larger and more sluggish. Plan accordingly. Use headphones for the best experience!