Like most games on this list, NinJump isn’t complicated, but it is addictively fun. Your ninja is scaling a wall, and he must leap from side to side while avoiding enemy shurikens and strangely violent birds (don’t ask us why) as he progresses. The higher he makes it, the higher your score and the happier you are to show off your NinJump skills to your friends. A variety of shields and boosts spice up the gameplay just a bit, too. Only a handful of in-game ads mar the experience.