This game is fantastic, no wonder so many streamers are playing it!
I feel like the main thing it needs is replay value.
Here are a few ideas I would suggest:
1: Different random opponents, perhaps give them personalities / stories that make you feel something when competing. Maybe they're a bad person and you want to kill them, maybe they're a good person who just needs the money badly, maybe they're lying.
2: The ability to gamble your money for a higher score.
3: The ability to buy items that can carry over to subsequent playthroughs, similar to the card game in Resident Evil 7. Keep your money & items each time, but once you die, you lose everything.
Just a few ideas. This game has SO much potential, please keep it up!