15 puzzle | fifteen puzzle is a simple sliding game. Your goal is to arrange tiles in ascending order (left-to-right, top-to-bottom) by moving puzzle pieces. The 15 Puzzle Game is also called Gem Puzzle, Boss Puzzle, Game of Fifteen, Mystic Square, Numpuz and many others. How to play 15 Puzzle? 15 puzzle is a Sliding Puzzle that consists of a frame of numbered square tiles in random order with one tile missing. The goal of the puzzle is to place the tiles in order by making sliding moves tha