JJ

JJ is an action game developed and published by Square for the Famicom in 1987. In English, it is sometimes referred to by its long-form name Jumpin' Jack or by its subtitle, Tobidase Daisakusen Part II. The game was released only in Japan. A sequel to Tobidase Daisakusen (known in North America as 3-D WorldRunner), JJ is a scrolling shooter that uses a third-person perspective, with the camera positioned behind the main character. As in the earlier game, Jack travels across multiple worlds using his jumping ability and laser cannon to defeat the serpentbeasts that have overrun the planets. JJ was the last Square game to use the "3D mode" and 3D glasses, and it was also Square’s final work before the creation of the Final Fantasy franchise. Its soundtrack includes eight tracks, all remixed or reused from the prequel, 3-D WorldRunner. The music was composed by Nobuo Uematsu, and JJ is his 16th video game music composition credit.

In JJ (Jumpin' Jack / Tobidase Daisakusen Part II), Jack journeys across multiple worlds after serpentbeasts overrun the planets. From a third-person perspective, he uses his jumping ability and a laser cannon to fight through hostile terrain, drive back the invaders, and restore each world.