Just checked out the map, and honestly it’s a nice concept!
I would definitely add some more randomness in the trees(For instance, different branches, different height, slight difference in some coloration, etc.
I would also add some more randomness in the mountains, as currently is just looks duplicated.
Currently it doesn’t look like a lobby, and more like a terrain map. Some possibilities to change this would be the following:
Some builds, like a shack, etc.
A main building/cabin house,
Possibly a fire pit?
You could also add a path with low poly lanterns, which (imo) would look nice with your current build.
Other than that, you’re doing good so far!
If I were to say a price it would sell for, I would say around R$100 as it’s currently relatively easy to re-create. Add some pizzazz! Make it your style!