As Theoden, It seems a little bit darker to me. Even if the scene is very dark you might want to highlight some part to improve the mood of the scene. For example the moon or the stars.

Keep going!

I really love the shading pattern you choose for the roof of the house. It gives the scene some character. As was mentioned before, up-ing the contrast would really bring out this piece. Sometimes you have to step away from a work to see those kind of things and come back to it later. Keep it up

pretty cool. it could even look better with some  more  experience...... keep it up!

Thanks guys, very appreciate your feedback and advices! 

Looks nice.

When I first saw the moon I instantly thought that it needs to be the brightest object in the scene. This is also the case for the stars. The cluster closest to the rim of the moon has a very dark color compared to the scene. And that makes it look even duller.

And I think the overall colors are a bit low on contrast too. Making shadows darker and highlights more saturated might give it a more appealing look. 

You did a very good job on the trees!

Keep it up!

Hmm to kinda fish for some criticism. The pathway from the staff-user to the house is a little bit hard to wrap my head around. First, the perspective of the initial connection between the cliff  the main-guy is standing on and the path is a bit ambiguous, it kind of looks disconnected from the cliff. Im not sure how that path is floating there. Second, at the end of the path, it blends with the cliffside the house it resting on, adding more confusion. I had to fish a bit hard for that one, one small nitpick with alot of good things. Your clouds, nightsky and house all are great, smooth and well constructed.