Hey there :3

First off, I'm going to talk about your terrain. I like it, it has good shape, and works with the plot. However, I think the cliffs could use some diversity. Try mixing some other blocks in with the stone so that you have a palette going with it, like you have with the coloured clay in the grass.

You have some nice organics, I like the flowers, however they are a little simple and all look the same. You could make some of the petals on some of the flowers have a little more shape, than a consistent 'circle' type pattern. Your trees are great as well, although maybe add leaves to the other one you have in the corner without leaves :p

Lastly, I think your structure is lovely. I think it's extremely creative and bizarre, and because of those features, it's lovely to look at because you don't see it everywhere!

Overall lovely :3 Just change a few little things I mentioned ^.^
Good luck!
- Dutty :3