Unblock Ball Slide Puzzle 2

Unblock Ball Slide Puzzle 2 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. Listed under avoid, block, puzzle.

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.