Mary-Kate and Ashley: Winner's Circle

Summary
Simple riding game (the first one for Game Boy I could find), featuring Mary-Kate and Ashley, aka the Olsen Twins, who at the time were apparently popular enough to warrant their own game series but had nothing really to do with horse riding.

Game Design
Isometric view. The horses look a bit weird but have quite detailed and varied markings, considering the limitations.

Gameplay
There are three "Tournaments", where you have to clear three different courses as fast as possible and are ranked accordingly and "Challenges", where you have to collect a certain amount of items in a set time (3 minutes). You can choose from different horses with different stats. Completing challenges gives you access to more horses. You can play as either Mary-Kate or Ashley, not sure if there are any differences (isn't the whole point that they look the same?) and pick colours for your outfit.

Riding Mechanics
At the beginning you have to choose from two different ways to steer the horse: Either "Mary-Kate" where pressing right (or left) has the horse turn clockwise (or anti-clockwise) or "Ashley" where pressing a direction makes the horse turn that way from the players view - I hope this is understandable it certainly took me a while! A is to jump, B to speed up, there's no slowing down and the horse will only come to a halt when crashing into something. If you tear down a fence ("Fault")there are no penalties but "Perfect" jumps will improve your horses stats. If you get stuck in a jump, it usually helps to press A to make the horse rear and then turn it around so you can try again. The arrow in the lower right corner shows the direction of the next jump/item/finish. The number at the top shows the remaining jumps/items.