This game has the potential to be fun and mind occupying. That being said, it is also quite slow, and if you don't buy the "no Ads" version, there is a long ad after every 1-2 puzzles, and that's when it is not crashing. It's extremely frustrating and impedes tournament progress...😧 Update: I don't know what happened in this latest update, but the game crashes constantly...seems like every 2 minutes or less!