Slide the numbered tiles back into order. Four board sizes from a gentle 3×3 to a brutal 6×6 — every scramble is guaranteed solvable.
How to play: tap any tile in the same row or column as the empty slot — it slides (with everything between) toward the gap. Arrange the tiles to read 1, 2, 3… left to right, top to bottom, empty slot last. Arrow keys work on desktop.