Its a really nice game, just 2 nitpicks. You should display somewhere how core from a hand is caculated(it seems to be card value+ hand bonus but hand bonus isnt visible anywhere). Also it feels kinda weird when I play a two pair for example and a 5th card it also gets the two pair bonus but thats maybe just me. I wanted to talk a bit about balance but idk how you wanted to balance so I could be completely wrong.
Good luck with everything and I hope you continue development.