Very good but not too consistent
This piece definitely jumps out at you, I think that's mainly because of the rays of light coming from the moon (seriously, it feels like it's going "TA DAAA" and that's not a negative comment). But like it was already said the attention to details are kind of inconsistent--it would have been great if you gave those trees and clouds the same amount of details as you did the moon and it's halo... Those trees would look great if done like the wolf's fur. Speaking of the halo, the groups of lines have too many gaps between them, this is especially obvious in the thumbnail view. If you'd spread out the strokes more evenly it would look real impressive.
This critique isn't meant to be negative or like you didn't do enough, mind you. It seems like this was a sort of quick piece, and since you said it was meant to be a serious one it still comes off well. I just think you have it in you to improve it!