Fun! I had trouble understanding how it worked at first, like the rules say to press "ok" but the button is a checkmark (that tripped me up for longer than I'd like to admit) and the fact that you have to press it multiple times wasn't clear. Maybe in if there's a future build you could add text to say what "phase" it's in? Like buying, betting, etc.
I think I cheesed it since you can keep putting bets on the same spot, just in increments of 20. So betting on even/odd and doubling money every round haha. I got to 120 and then it crashed? At least, it's not accepting any inputs.
If this was longer I could totally see getting addicted to it.