not bad...
its good actually :) but there are a few problems with your anatomy of the characters...
1) the most noticeable problem i see with it is the girls front foot...it shouldn't be so flat and angled like that...it looks like the foot is being smashed into an invisible box kinda...you should ether show the rest of the foot or only show the ends of the toes...also her elbows are a little edgy and off form where there supposed to be but thats not that big a deal XD
2)the dead nights upper arm needs to be longer in comparison to the rest of his body and his forearm....also his head appears to be just a little too small
3)the person in the foreground seems to be a little to small for how close he is to the viewing point
other than that its really good...and sorry for seeming pompous or like i know it all because i know that i dont but i still wanted to let you know what i thought about it...oh and also i really like the way the full moon and the other tones work together almost making a somber effect i think it complements the overall effect that you where trying to capture...anyway i hope my advice helps :)