I have 3-starred every level before moving onto the next, usually 2-starring first time, occasionally all 3. I have not even come close to needing the hint system and I am on 3-9, nor do I understand why the IAP would get in the way of the experience. I hope that the complexity is at the max for the the Blood Money levels! This is my first itunes purchase (fiances iphone since I use only android) and i am happy with it.
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