Overall

Vision Vision

Originality Originality

Technique Technique

Impact Impact

First thing what comes on my mind is that shadows lines from Spike's face (should not be there)The background is different then characters (no shadows and that simply colors attract attention from pic)The hats looks like is not from there (it looks like you cut them from another pic and put them in this pic)eyelashes are over hats (so much on Sunset)That white thing it would be snow I guess (wrong position on hats and it should be little shadows on it)This pic it makes me think more you made a photo manipulation then a drawingI hope my critique will help you to improve your drawings*sorry if I have mistakes on my english