Nice game. Sounds like you had some bigger plans for the way the coins were used and I think that's worth exploring. I think "flip a coin" and "roll the dice" have the same energy imo, so i think you did well to fit the theme, but it would be nice if there were more options. The game overall though is a cool expansion on deck building combat, and worth fleshing out to see sorts of things you can do with coins instead of cards. Also I loved the coin flip animation!