Jumpero

Jumpero sits on the Action shelf of this catalogue, and opening it is the whole setup process. Taps and swipes are the whole vocabulary — a phone plays it best. Listed under 3d, 3d games, action, adventure, boy.

It is drawn for a tall screen, so it fills a phone held upright rather than a wide monitor. It costs nothing and asks for nothing: no registration, no download, no launcher.