Jumpman is a bomb disposal expert. He is called on to save the Jupiter headquarters after the evil Alienators invade it and booby-trap its 30 levels.
In this early platform game, the titular hero must find his way around each screen, collecting every bomb. There are platforms and ladders to use, and a jet booster to propel you up the screen. However there are also enemies to avoid, and Jumpman must be careful not to fall too far.