In Nitrome's J-J-Jump, players have a limited amount of jumps to get to the goal at the top of every stage. Checkpoints and the rainbow goo draped on some platforms or found in floating spheres replenish jump ammunition.

J-J-Jump's 10 stages gradually become a true test in twitch gameplay and jump-rationing strategy. Players dodge black fire, midair spikes and squishing platfoms, use enemies' heads in lieu of jumping, and avoid the rising, deadly water.

J-J-Jump retains Nitrome's bright color palette, but the graphics have taken a charming turn for the retro. J-J-Jump feels "pure" in the sense that the developer doesn't beg for replays to get three stars. It only asks players to survive and ration each J-J-Jump.