Hey there :3

Firstly, terrain. You have a good diversity in the layers, and have mixed blocks in really well. Nothing bad to say about your terrain, I like it a lot! I would, however, just to add some atmosphere maybe scatter 4 or 5 lily pads on the water, just to give it that small amount of detail so it's not just a solid 'chunk' of water cx

Secondly, organics. I do like your trees, however I feel like the trunks of the trees are a little wide for the leaves you've given them. Either make the smaller tree a little taller and equally as wide, or thin out the trunk a little in the centre of it.

Lastly, structure. I like it, but I would work on the detail a little. The shapes you've made with the stairs are a little too 'sharp' and don't fit with the style of the house you've made. I'd keep the stairs to the corners, and maybe make some small windows in the centre of the walls ^.^

Good luck!
- Dutty :3