Was great until I reached lvl 11 and it wanted me to learn about challenges. The game at that point is broken. Prompt me to press the challenge icon to learn about it but wouldn't do anything. The game wouldn't even let me skip it or do anything else. So since I couldn't progress I uninstalled the game and try reinstalling it. Still same issue. So permanently uninstalled. Would have given more stars and may have invested so money into this game if it wasn't broken...