Very nice presentation and game flow. I like how you went all-in with the betting terms and concepts and all, I feel like I learned (a bit) by playing the game (thought there’s no way this could turn me into a gambling person, haha!).
One small addition I would suggest, if you’re open to it, would be to have some kind of indicator on the horse the player bet on…? It would make things easier to follow, but then again, maybe it would break the immersion, I don’t know.