Hey there :3

I'm going to start by talking about your terrain. I think it's great, it works with the small plot, you have a little water area which gives the terrain some depth and also looks cute! My only issue is some of the edges of the layers of terrain are a little rough. You could smooooothen them out just a tad. I also like the little addition of a mine, but having it sunk into the side of the hill may look visually better, like it's been dug into.

With your organics, I think they look great. I think your leaves could be a little better thought out, they're leaning to the side on the smaller tree, and on the larger one they look a bit messy. As well as that, you could add some roots to the trunk, and try and make it slant a little, so they're not straight up. Search 'Plutouthere' on Youtube and watch some of his tree tutorials :3 maybe that'll help a little.

Lastly your structure. In my opinion, this is the weakest part of the plot. But that's completely fine, it's nothing too much you need to change. You have the detail right, it just doesn't fit on these buildings. And that's because you lack a frame and an appropriate roof for the buildings you've made. Without a frame, the detail just looks like it's hanging off the walls, which doesn't look right. A frame, incase you don't understand what I mean, is like this:
(https://imgur.com/GhQCyGk)
The frame in this picture is the oak logs. Basically it means you can add basic depth, which you had on your build anyway, it just looked a little odd without the frame. And then, you need a roof. I think it needs to come up more, using full blocks instead of slabs/stairs.

Good luck!
- Dutty :3