Mahjong Blue is a tile-matching game with a blue theme. As with similar games, the player must clear a playfield of layered Chinese Mahjong tiles by matching pairs of tiles. With this version, gradient-white tiles with dark blue edges rest on a solid light blue backdrop. This is the only difference between Mahjong Blue and other traditional online versions of Mahjong.
The player doesn't track their moves or score. They don't need to collect points or beat a timer. They merely need to remove all the tiles from the blue background.
The Mahjong tiles feature traditional bamboo, dots, dragons, plants, seasons and other markings in green, blue and red colors. The player can only match uncovered tiles that have at least one free left or right side. They also can't select tiles covered by or between other tiles. With plants and seasons, they don't need to match the picture on the tiles. Instead, they match tiles from the same categories, respectively.
Mahjong Blue allows the player to load a new game at any time with a white back arrow button at the lower-right corner. Otherwise, there are no other play options. The player doesn't receive hint or undo buttons. They don't even receive a warning if they're about to run out of moves.
