Yvette-3

Level 1

Nothing.. the icon is a grey colour you press it and nothing happens and to be honest, I'm not exactly sure what you can buy with them unlike the gold bars that can add extra turns etc. 

Of course it is, to all of the above. Prob been playing this for over a year and I've never been able to access the coins. Or are they only accessible after a certain level. Like I said I'm only on level 94.