My first run I managed to get myself stuck outside the map, but as a fellow Unity dev, I get that that happens all the time. Second run I made it all the way to the end, slowly piecing together that I was the son of the great mountaineer. I would say the bits of campfire dialog were probably the highlight of the game, though the text scrolling could go a bit faster.
A couple suggestions for your particle systems: for the fire particles, if you change the type from a billboard to a mesh, then put an icosphere/cube or other similar mesh on it, it will look a lot more fitting with the rest of the games graphics. The wind could probably be improved if you enabled noise, reduced the noise strength so the noise is only slightly noticeable, made the particle a bit smaller, and then enabled trails.