This game is to clear mah-jongg tiles by creating matches within Nikaku, which means two corners. You can proceed to the next level if you clear all the tiles on the board. It is game over if you run out of time or cannot create any more pairs on board and become dead end. The rules of clearing tiles are as follows.
1. Tiles next to each other.
2. Tiles that have no other tiles between them.
3. Tiles that are along the same edge.
4. Tiles that have no other tiles between them and can be connected within 2 corners of each other (Nikaku).
All the functions are available.