So...
As both a gamer and an audiophile, I have to say that this is excellent work. Right from the introduction, your song establishes a strong connection to the old world of the Wild West as well as a glance forward into a slightly dystopic future. The sound of stomping hooves paired with a faint mechanical creaking was simple, yet catchy and effective way to do this. The song progresses in a smooth and journey-like manner, and I can totally hear this being used for a western themed level in a cool side-scroller (like Castle Crashers, obviously) where the objective is to reach a giant mechanical cowboy boss of some sort. Seriously, I have to give you massive props for accomplishing this so well, especially since you did it all in one evening.
Cheers!
Alex