Watching the horse go at the speed of sound after buying the synthetic oil was the funniest thing I've seen today.
My favorite things about this game were the achievements and the day/night cycle. I also thought the music and pixel art was charming! My only suggestion would be adding some other sort of mechanic, like certain towns holding special items or the visual adding of the shop items (Example, literally giving the horse wings or a monocle) to make the game a little more interesting. But given the time constraints and all, great work and happy jamming!