Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. JJ is a video
game developed and published by Square for the Nintendo Family Computer
(known internationally as the Nintendo Entertainment System) 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.