Uninstalled after 3 evenings play. Reasons: (1) forced to watch an advertisement after every game. I never take any notice of ads whatever they're for, they're just an annoying waste of time (2) more important, the game is programmed so you always fail, the algorithm invariably gives you pieces that are impossible to use, every time, and yoy NEVER recieve any 'lucky breaks', ie the piece you need at the right time. So I conclude, it's not random, it's a set-up to make you watch more ads