Another good version of the classic Mahjong puzzle is Jade Mahjong. The rules of the game are the same. Nevertheless, the game has a brighter user interface that will appeal to beginners and to avid gamers. You have to remove pairs of identical chips with images of alien space symbols.
The time is unlimited but you have 10,000 points that decrease every second. The faster you disassemble the Jade Mahjong pyramid, the more game points you have left.