Although the traditional thing about racing games is that they are always between two motorized vehicles, there is also another type of more natural racing, such as the one offered by this Pink-pony.
Pink-pony is a multiplayer racing game (in the purest style of Tron) in which you must control a horse, or more specifically a small pony, because the race is played between fast ponies at full speed. But you can not go anywhere, since you must avoid at all costs the sprinkles of flowers that you put them are leaving wherever they step, while you have to force others to go for them.
Pink-pony is a different racing game, but just as entertaining.
You can free download Pink Pony 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.