The Fifteen Puzzle is a sliding puzzle that consists of a frame of numbered square tiles in random order with one tile missing. The object of the puzzle is to place the tiles in order by making sliding moves that use the empty space.
Click or tap any tile adjacent to the empty space to slide it into the empty slot. Rearrange the numbers sequentially from 1 to 15 starting from the top-left corner with the empty space ending in the bottom-right corner to win!