I have noticed a few problems.
1: Cards per hand / hands per encounter / discard per encounter don't save, they reset if you load.
2: The damage and pot are capped at the max of 32 bit signed integers which is quite low. I would suggest using a ulong instead of an int because otherwise the infinite mode is basically worthless. (other than getting on the leaderboard ;)
I think there might have been something else but my mind is blanking right now I'll try to update this if I remember. Good game though.
GameplayPolish