Flappier Bat

Flappier Bat is listed here under Adventure. There is no launcher and no install between you and it. Taps and swipes are the whole vocabulary — a phone plays it best. Its tags here are action, adventure, fly, interactive, jump.

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.