Paint Tomato

Paint Tomato runs straight in the browser. It is filed under Puzzle, and it loads on the page you are reading. It is built for touch, so a phone or a tablet is the natural place for it. Its tags here are 1 player, board.

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.