You are Harry the worm. You are locked in a maze with other worms. You must avoid them to pass the level but you can nibble on the other worms. However, if the enemy worm is longer, you should nibble on it from behind or in the middle. Only when you are longer than your opponent can you dare to approach him. But Harry can also lose a segment if he is approached from behind. New worm segments are available when you eat an enemy worm or a B that appears from time to time. Once you have eaten all the enemy worms, you move on to the next round with a new maze.