Alien Jump

Alien Jump is one of the Hypercasual games here that asks for no download and no sign-up. It is built for touch, so a phone or a tablet is the natural place for it. Tagged alien, arcade, hypercasual, jump, jumping.

It is drawn for a tall screen, so it fills a phone held upright rather than a wide monitor. Free to play in the browser, with no install step between you and the first round.