Initially it was a good and fairly easy game. The final free level, Fortress, became impossible to solve. So I tested the hint option for the entire puzzle and even the game couldnt solve it. Then...THEN... A message pop up came on saying that my iOS has been compromised and to call this random number. It wouldnt let me click out while on the game so I closed the game and deleted it ASAP. Quick google search shows its a scam. Will be reporting this to Apple.
KALMdown about Mahjong, v1.7.3