This is one of THOSE games that lets you play free until you hit a "Super Hard" level that you won't be able to pass without spending cash. I'm in the 300s, but I'm at a level that cannot be passed without both starting boosters and in game boosters. Even starting with one of each of all 3 starting boosters and using on-hand boosters I couldn't get through, now I have no more, and refuse to reward them with money, so I will not be playing this game at all much longer.