Game has 10 different slide puzzles. Each puzzle can be played in 3x3,4x4 or 5x5 mode. You must try to reach Master level. Levels are achieve by accomplishing goals which the player can see in by pressing the Show Stats button. Computer uses an advance heuristic to solve puzzles. You must try to solve puzzles in less moves than the computer can. Lots of slide puzzle fun. Plus you can set the color theme for the slide puzzles. Solved boards with lowest number of moves are saved for each board type. The game scales well on PCs, phones or tablets. The game is free but has a small add banner at bottom of screen with can be ignored or click on if you see something interesting.