A classic game of puzzle 8 (3x3), 15 (4x4), 24 (5x5) or 35 (6x6) in which player has to move pieces on board so they are from 1 to 8, 15, 24 or 35. Positions of pieces are generated randomly, but every generated game has a solution. Customization: You can use image as a puzzle - you can solve any image you add to folder textures within folder with game, but image name must be '