Hey there!

So first of all, a bit about your terrain. I actually really like it! I think it's vibrant - I love all the colours and the style is great. I love the diversity between the cliffs and the peeks. It's really really nice.

Secondly, your organics, which you actually have none of. Maybe something on top of the cliff could be nice - a tall pine tree, or a tree hanging over the edge of the cliff could be nice :3

Lastly, your structure. The structure you've shown is okay, but the 'checkerboarding' stairs as detail doesn't look nice. However, I do like the interior of the mineshaft, it's nice ^.^
You're also going to need some more structure on this plot, either something small on the top of the cliff, or something similar to the Mineshaft opening.

Good luck!
- Dutty :3