I want to like this but...
You have a certain amount of coins and every reveal costs like 20 coins. How are you supposed to solve these puzzles if you have no hints at all. So for the people saying that they have this many reveals remaining but they cant use it it is probably because you have no coins left. You should give an allotted amount of reveals if you have to pay to use them up.
Aweyer about
Guess Who - Once Upon a Time Hidden Pic Edition