I like the story very much! :)
I would add something more to the gameplay. When I was still at the stage of prototyping during this jam, I was thinking about a similar game where the collected gold slows you down, but I wanted to add a mechanism that sometimes you want to be "light" (because you have a lot of jumping or you run uphill), and sometimes you want to be heavy (because you go down the hill, so the heavier the faster), then you can change tactics during the game and this gives additional depth.
Good job!