Butterfly Mahjong is a great free online mahjong game, and it comes with a revolutionary theme or concept. As with all other mahjong games, you are supposed to remove the tiles from the game by pairing up those with similar symbols; the tiles must have at least one side free; whether the left or the right. Now this game uses a new concept based on its theme. The tiles are arranged in form of a pyramid and they all have the symbols of butterfly larvae. When you click on them, they turn over and become dark, and they also have the symbols of a pupa. As you go on pairing the tiles, and they too turn into pupae, the others begin turning back, and this time they have a beautiful butterfly waving its wings at the top. This means that the pupae has emerged from the cocoon and is ready to fly. When this happens, and you pair them again, the butterflies will actually fly off the screen. This is a great way of keeping someone entertained. At least you know that you have to interact with the tiles twice; once in the larvae form and once when the butterfly emerges from the cocoon. The game has a timer and the bonus you get will depend on how fast you can clear the tiles. Since you have to interact twice with each tile, the game gives you 30 minutes for each level; unlike the 15 minutes that most games give. There is a pause button which you can use if you have to attend to another matter briefly and then you can get back to the game. Avoid the use of the hint button since it will cost you heavily; the same can be said for the use of the shuffle button.