Barbell Sort Puzzle

Barbell Sort Puzzle sits on the Puzzle shelf of this catalogue, and opening it is the whole setup process. Taps and swipes are the whole vocabulary — a phone plays it best. Tagged brain, kids, logic, matching, mobile.

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.