that was actually a lot of fun. I think it has the potential to grow into a bigger game.

Bug Tux Racer vibes btw! I think adding some music and perhaps snowfall could make it even more immersive

edit: and i think you could easily make it feel more detailed by adding a texture for the snow,and increasing the resolution of nearby terrain by modulating it with some precomputed fractalized perlin noise. So basically "free" detail that only exists in the rendering logic, does not influence the complexity of the heightmap. and perhaps you could replace the trees with sprites that are images of real trees (stylized to the visual style you're going for)