Hey there! :3

So firstly, your terrain. I like how you've tried to overcome the limited space for terrain on this plot, it looks okay. You've also managed to include a water section, and it looks nice!

Secondly, organics. The trees you have are also good, but the leaves on the smaller tree could be less square. Remember you now have w/e, so you have make a brush for leaves! Remember to include a high percentage of air in it, however.

Lastly, structure. I wouldn't have made it so big, I think it takes up too much space on the plot, but it is what it is. It looks good, but because of its size, the detailing has to be really great - but in some areas you lack detailing. You could use quarts stairs on the flat quarts areas, just so it gives it more of a shape instead of it going straight across. I would also suggest not using the 'checkerboarding' pattern like you have with the red and blue glass/wool. It looks too cliche and not creative - try making a more interesting pattern!
I really like the interior, however. Nice and original!
The roof could also use some patterns, like with stone slabs in the quarts; try it out!

Good luck!
- Dutty :3