You're a horse out of the barn and on a hike!
Run your horse along the path through the forest, collecting as many gold coins as you can to unlock bunches of upgrades that include longer duration of bonuses, extra lives and even survival mode. But beware of the boulders, fences and other horses as you gallop along.
Swipe up on your device to jump. Swipe down to slide under things. And side to side to avoid the obstacles.