Hey there! :3

First of all, your terrain. The majority of it is completely flat. But the terrain in the corners is okay - you need more of that around your plot. I like how you've chosen to decorate it and the flowers you've chosen :)

Secondly, your organics. The leaves are looking a bit too square. You have a good amount of layers, but it's way too squared off on the corners, and not 'random' enough. Make the leaves more circular, or at least rounded on top ^.^

Lastly, your structure. I think it's nice, but lacking in detail slightly! You could curve it off a little - Each layer is a little too defined, this is where you could add stairs to add detail and depth ^.^ Some of the wall designs are a little simple and could use this too.

Good luck!
- Dutty :3