Exactly what it says on the tin! First, I'd like to see you implement a skill into the game so we can improve our movement speed over time, above the current base. The more active we are, the more it levels up. You could also branch it with horseback riding, so that once you hit the part it would normally branch, you then had to decide if you want to keep improving your run speed or your riding speed. Top end branch would probably be a choice between speed-running or some sort of combat evasion for Runner, while Rider would get maybe something like an easier time befriending animals, or being able to whistle for the horse (haven't gotten that far so I dunno if that's a thing you can do already or not). Perhaps as we level up our running, we'd gain more maximum energy, too, for getting more fit and in-shape. Which brings me to the next skill: Endurance! Every time we use energy it should count towards increasing this skill, which will give us a higher max to work with. It should take quite a lot of work to level it up, and maybe only get 4-5 levels or so, but having that feeling of progression would be ever so satisfying. Maybe add some accessories or footwear that boost either of these stats, too?