Very nice! I love the mountains. Can I ask what texture(s) you used? They look amazing. The forests look good as well, though I think the borders of the forests could be a bit less 'neat'. A forest normally doesn't just stop somewhere, it looks more natural if there are some trees standing apart from the rest as well. I'd also make the 'box' at the bottom right a bit smaller so it isn't as close to the island, but that may just be a personal thing.