I remember that toy and had a lot of fun playing it although I used to cheat a bit by shaking the toy to force the rings to move in the right direction
I'd love to see a casino version of it but developing one is going to be very challenging. The design and animation can be easily imitated but not how it works as winning on the real game depends on how skilled the player is and the laws of physics while the casino game needs to be based on pure luck.