The story is presented in a short prologue sequence at the game's start. "In a time and world not of our own", a wicked sorceress uses her evil powers in an attempt conquer the world. She summons twelve powerful minions, each of them representing one Zodiac sign, and sends them to create havoc. The slinky must battle through 12 stages of enemies, destroying each Zodiac boss along the way, in order to reach the sorceress and stop her evil plot. The slinky is able to move along the floor, walls, and the ceiling by slinking along them; it can also make a short jump to move between walls and platforms to slink to a different section of each stage. The slinky is also equipped with a machine gun that fires to both sides of it to take out the myriad of enemies that swarm you on each stage. The player is given several hit points which can be increased with power-ups as well as several lives should the player die and unlimited continues. A time limit is given for each level, and the goal is to reach the Zodiac boss of the stage and defeat it before time expires. On the final stage, the player must defeat all of the bosses in succession before being allowed to duel against the sorceress herself. When she's dead, a battle commences against the real end boss, "the creator".