Honestly I never come across any game in the name of farkle, yes I am less active on social media platforms and I rarely do check for games. It seems like a modified version of dicing, anyway I guess it will be loved by this community when it will be addictive as explained by you. Really loving to experience first it in your portal.
Our betting currency will be 'bits' (0.000001BTC) So if you have 1,000,000 bits you have 1BTC.
Why you are too conscious about your base currency notations? Bits is good to have but providing the familiar thing to everyone must be the right thing to do. I mean you must have options for users to choose their own preferred base currency format for cryptos. So, you need to provide options like how electrum wallet is doing for example.