Wildlife Safari Five Diffs

Wildlife Safari Five Diffs 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 clicker, difference, fun, hidden, 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.