It is an electronic form of an old mechanical sliding number/alphabet puzzle. It is equally popular among children as well as adults. It is a time based puzzle and the challenge is to complete the puzzle in the minimum possible time. The new exciting thing is - you can view the best timings of all the players who have played the game on a particular device.
You will feel compelled to play it again and again to beat your previous best scores. Playing this puzzle will improve your analytical and logical skills.
App can be installed or moved to SD Card.