This reminds me of the old Sigma Derby casino game.
Don't know if anyone here remembers it / played it but:

https://en.wikipedia.org/wiki/Sigma_Derby
https://www.reviewjournal.com/business/casinos-gaming/horse-racing-game-survives-test-of-time-in-las-vegas-casino-1835174/

And they have newer versions also:
https://www.youtube.com/watch?v=0ChxUrsFYC4

So I can really see this taking off if it's done properly.
Putting in some tame and effort to make it a quick / fun race and there will probably be a ton of people playing.

-Dave