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I play Hidden Objects Online 2 and have amassed a huge amount of coins.  I don't know how to use them to buy crystals, which will allow me to play right away when I lose a round.  Otherwise I have to wait 15 minutes.

Also, I don't know how to use the "freeze" function.  Many players freeze me, and I can't freeze them back, which puts me at a huge disadvantage.  

Can anyone help me?

I have the same problem, have accumulated several thousand in money and have no idea how to use it to buy crystals.  Any idea?