JJ: Tobidase Daisakusen Part II, colloquially known as Jumpin' Jack, is a Famicom action-shooter game published and developed by Square in 1987, exclusively in Japan. A sequel to Tobidase Daisakusen, or 3-D WorldRunner in North America, this game introduces players to a scrolling shooter experience, enhanced with a third-person perspective. Players guide the main character, Jack, to fight serpentbeasts on different planets using his laser cannon and jump abilities. The game stands as Square's final project exploiting the “3D mode” and 3D glasses before launching the acclaimed Final Fantasy series. Its soundtrack comprises eight tracks, all revamped or reused from 3-D WorldRunner, and is the 16th game music composition of Nobuo Uematsu.
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, Jumpin' Jack, or by its subtitle, Tobidase Daisakusen Part II. The game was only released in Japan.
The sequel to Tobidase Daisakusen (known in North America as 3-D WorldRunner), JJ is a typical scrolling shooter, but it incorporates a third-person view, where the camera angle is positioned behind the main character. As in the previous title, the main character Jack must travel through various worlds, armed with his laser cannon and jumping ability, to defeat the serpentbeasts who have overrun the planets.
JJ was the last game by Square to utilize the "3D mode" and 3D glasses, and was Square's last work before the inception of the popular Final Fantasy franchise. The soundtrack of JJ consists of eight tracks, and all of them are either remixed or reused from the game's prequel, 3-D WorldRunner. The game was scored by Nobuo Uematsu, and is Uematsu's 16th work of video game music composition.