This is quite funny indeed. Spent more time unloading some evil on that poor horse than I expected xD.
I would say one thing you could definitely improve is the lower dock that has "weapon" options, making it smaller or less intrusive, cuz at some point my horse was underneath it and was kinda hard to see and attack, you could also put the sprites of the "weapons" in the buttons instead of just the name for some quality of life.