"Use the arrow keys to avoid enemies and use 1, 2 and 3 keys to activate powerups. There are 4 different enemies. Just random bacteria, stickey bacteria, white blood cells and lost condoms. You can use the powerups to make the trip easier. You can shrink, make an explosion or hold an electric shield. But watch the energymeter, since you need your energy to become a real human. Thats it!"