There is one thing that you should know about this coin. I think it maybe infringement copyright or are in conflict with other use. If you search for 'miracle coin' you get a google result that points to a warspear online miracle shop. There you can buy miracle coins for that game.

Maybe its not a problem because its a ingame coin and they are using it at a very loose sense. Miracle and coin are also used before so it would be hard for them to prove infringment.

Posted just for your knowlegment.   

No dev, no problem.