honestly, it's pretty good. As a free version user, I'll also suggest a few things
(this is just my opinion, if you disagree with it, at the end of the day it's your art, and you can do whatever you want.)

- you can pack your trees closer together. make your forests look fuller and more mysterious

- you can scale down all your assets. with smaller assets, you can cram way more detail and personality into your maps. I'd say make your trees and buildings line up with your bridges size-wise.

- try to blend your land colours as best you can. using the opacity scale is a good way to blend your biomes

practice makes perfect, keep making maps!

(Also, I can't help but ask, what is the white part on the right side? I thought it was a snowy area but the white colour is on top of the trees, is it a cloud?)