Gameplay is pretty basic: your ninja starts running up one of the sides of the building automatically, and every time you touch your screen, he'll jump to the other side and slash his sword in the air. That's all you need to know to play the game, dodging different obstacles and attacking your enemies.
The game is definitely pretty short, but thanks to an online scoreboard, you can compare your best runs with other players, and maybe revisit a level or two to see if you can improve.
NinJump is a entertaining game for short rounds, and to beat your previous records, although you may not find it as fun to play for more than ten minutes at a time.
Compatible with iPhone, iPod touch, and iPad.