Your objective in Mahjong Tower, a puzzle game based on a classic Chinese game, is to remove all the tiles from the board. Tiles are removed by selecting them in pairs that match. They then disappear, revealing other tiles to be removed. Tiles can be detached from horizontal edges to horizontal boundaries or from vertical edges to vertical edges. Any tile that is not on the boundary of a group is deemed to be blocked, and therefore cannot be detached until one of the four side it have themselves been removed. Good luck!