Click on a tile adjacent to the empty space to slide it. Organize the numbers in ascending order from left to right, top to bottom. Utilize the empty space as a holding spot to move other blocks. Solve the puzzle in the minimum moves possible for a higher score. Pick from different difficulty levels to test your strategic skills. Retract your last move if you make a mistake by tapping the undo button. Restart the puzzle at any time to start over. Monitor your move count and time to better your performance.