HopScotch

Open HopScotch and you are playing — a Hypercasual game that runs on the page rather than beside it. Taps and swipes are the whole vocabulary — a phone plays it best. Listed under 3d, arcade, fun, girls, html5.

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.