This game is an old logic game, where you must reorder the numbers.
Maybe you had also one in your childhood.
A little variance is in, be sure you know which corner is the missing tile.
3x3, 4x4, 5x5, 6x6 sizes included.
Control it with click or swipe gesture.
Customize the background color, or just leave it random.
With Family Sharing set up, up to six family members can use this app.