Butterfly Kyodai is a free mahjong game where you have to match up tiles with beautiful butterflies. By matching two of the same butterfly, you can make them fly away gracefully.
Most of the rules for mahjong are used in Butterfly Kyodai. You can only match pairs around the board's edges. If a butterfly is blocked by another piece, it won't count unless it is right next to another butterfly.
The game is hard because you have to get rid of as many tiles as you can before the timer goes off. There is some help along the way, which is good. You can use three hints to find the pairs, and you can move the butterflies around to see them from a different angle.
Have fun and good luck!