Challenge of the Horse, or COTH, is a 2D endless sidescroller in which you are riding a horse. Your goal is to jump over the objects that await you as you gallop through the playing field. But not only must you jump objects, you must stay on the ground if objects are above you.
The horse will speed up every 15 seconds, and objects will begin to become harder to jump and dodge. So you must time your jumps and dodges accordingly and avoid crashing. otherwise, the game is over.