Used to enjoy this game. I appreciated the event challenges, as they required strategy and were essential in progressing main game progress for extra tokens. For the last 3 events, I have lost hours, if not days of progress. Doesn't matter how I shut down the game, things reset to before I put a ton of time and effort to advance the difficult desks and earn enough tokens for upgrading characters. Officially disappointed, won't be going back, not worth the frustration.