Great game, truly addictive. After reaching level 100+ wiped game clean to level1 and had to go through the annoying tutorial. My mother start again at level1 when she was on level120 or so. It forced game restart on my tablet also, luckily after what had happened to my mother, I backed up on GooglePlayGames and reinstalled. My developer brother says game account IDs being too short so is wiped by same/conflicting IDs.