With that tree on the stairs, you might want to make a break in the railing so that it looks like it fell from the grass, and damaged the wall when it fell.
Also, make the grass near the hole in the wall just dirt, since the tree would have had to uproot itself, and the grass probably won't have grown back yet.
Very nice layout, nice grassy hills, nice stairs, nice everything!
With that tree on the stairs, you might want to make a break in the railing so that it looks like it fell from the grass, and damaged the wall when it fell.
Also, make the grass near the hole in the wall just dirt, since the tree would have had to uproot itself, and the grass probably won't have grown back yet.