Goal

Arrange all numbered tiles in order (1, 2, 3 … N) from left to right, top to bottom, with the empty space at the bottom-right corner.

How to play

• Tap or click any tile next to the empty space to slide it in.
• Only tiles directly adjacent (up, down, left, right) to the gap can move.
• Use fewer moves and less time for a better score.
• Switch difficulty to play on 3×3, 4×4, or 5×5 grids.

Keyboard Controls

Difficulty

• Easy (3×3) — 8 tiles, good for beginners.
• Medium (4×4) — 15 tiles, the classic puzzle.
• Hard (5×5) — 24 tiles, a real challenge.