So I remember that there was someone that talked about a live mouse race game on this forum, can't remember the name of their site, I didn't check it out cause I didn't have much interest in it but I did check out their site and everything seems legit and site functionality is really good. You first of all create an account and then you deposit money to your and use the money to bet on mouses. You choose a mouse and then they all race against each other on live, if yours win, you get paid. I believe there are other Bitcoin race games betting sites as well.