47/50.
Its a nice set overall, but there's two things that nag me a lot.
first is the trees, which are nice but sparsely leaved so it doesn't look convincing. Especially the background center tree; the top left and lower center leaf bunch is just too thin and limited; optimally it should palm out more and have a little more thickness and shape. The foreground trees look fine, though.
The second thing is the path around the foreground right tree; it thins out too much (try to keep paths 4-5 studs wide, and 3 studs only for limited sections). adding another outer layer of 2x wide plates should fix the problem. A trick to see if its a "good" path is to pretend (or actually build) both sides of the path is walled with 5x height bricks, and check if you can walk through it. Don't take it as pathbuilding law though; some sacrifices should be made for aesthetics if necessary.
I really like the style here, though 879 bricks seems steep (same with the coast section, though I forgot to mention it). You might want to try less intensive methods of terraining (or work on brick conservation) since although these are great for small, elegant builds, they hardly do well for large-scale stuff and aren't a viable method to create terrain to structure buildings on.
As for positive feedback, your control of platescaping sloping is excellent; best I've seen.
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