While the Kentucky Derby has been called "the most exciting two minutes in sports," this horse racing simulation is so much about everything but the racing that it ends up being rather dull. In Rival Stars Horse Racing, you play as the latest in a long line of jockeys, one trying to make a name for yourself in the sport while also redeeming the family name. To do this, you have to not only win horse races, but also breed the horses, train them, and perform other acts that are part of raising race horses and managing a horse racing team.
Unfortunately, it's those other parts that make this less interesting than it could be. You spend so much of your time training the horses, building stables, and so on, and so little of your time actually racing (relatively speaking), that this feels more like busywork than a game. Though it also doesn't help that, after a while, the racing feels redundant. Sure, you have to steer, sprint when you need more speed, and even slow down to restore your sprinting meter, but if you've run one race, you've run them all. Which is why, unless you're really into horses or horse racing or animal husbandry, Rival Stars Horse Racing isn't that exciting.