Awesome hobbit hole! A fellow looks-like opportunist The paper buckling is throwing me off a bit, but I do like that speckled texture on your mountains; I'd suggest maybe playing around next with line weight for the top-lines of the peaks... think thinner and or lighter on the sunlit slopes and like you have done on the shaded slopes. Not that the style is bad, just as another technique to try for experience. Also try practicing washing out edges, like a gradient.
The river is perhaps a bit wispy and undefined on its borders compared with the solidity of the rest of the marks (I do like the stroke texture, just not the shore edges)--and I am definitely assuming that this is the river and the road is the smaller, darker stroke-- I'd be tempted to go over the river again with a wet, low opacity stroke the thickness of the river to give it a touch more definition, but that's me.
The grassy plain didn't read as a grassy plain to me; I generally associate soft washes or bare paper as plains, but again... just me.
Looks like you're having fun with it. Keep 'em coming, languard And if I happen to get too critical for comfort or style aim, do please let me know; I've a tendency to over-comment on occasion.