Bumper.io

An Action game that plays in the browser: Bumper.io starts on the click and keeps its progress there. It is built for touch, so a phone or a tablet is the natural place for it. Tagged .io games, action, arcade, arena, battle.

It is drawn for a tall screen, so it fills a phone held upright rather than a wide monitor. Everything runs client-side, so there is nothing to set up before you start.