Centipede

Centipede (also released as Centibug, presumably for legal reasons), is a variant of Atari's arcade game of the same name.

The player controls a laser at the bottom of the screen and must destroy a multi-segmented centipede/centibug before it reaches the bottom of the screen and devours them. The centipede changes direction and moves one row towards the bottom when hitting either the side of the screen or one of the many mushrooms on the playing field. Hitting a segment removes it. The centipede is split into two independent entities if a middle segment is hit. In the original arcade game, the mushrooms could be destroyed with four shots. In this version, a hit only removes one slice of the mushroom and it can only be destroyed by a series of precise, targeted shots.

Other creatures include a spider, which moves in from the side at the bottom of the screen and moves toward the player in a jumping motion. It must be destroyed by shooting from beneath when at the height of its jump. Neither the scorpion nor the flea from the original are featured, thus removing the concept of poisoned mushrooms or the possibility of replenishing destroyed ones. Taking their place is a snail, which moves slowly across the top of the screen, and the possibility of the centipede dropping a bug in the player's direction.

Reaching a score of 10000 and 20000 points awards additional lives. The difficulty of the game can be set in six levels.