The game gets to a point where no more tiles can be matched. That's true for any mahjongg game. In this app, it happens often, and that is poor programming. A recursive algorithm should be able to handle all lock-ups so that the game doesn't have to reset so often.
A must have for all Mahjong-Fans. Has a Mix-function of the remaining stones when there are no more possibilities. Not playable by keyboard.
Screen size is too small with High-res settings. I am forced to change screen res anytime that I want to play.