This is great! I think the colors you chose really reflect the mood of the background story. In general I love the lighting and glow effects; especially the ones on the man. You held it simple but at the same time the background is not too dark and not too overwhelming so the focus stays on the ghost and the man.
Now I really want to be able to do something similar to this just with colored pencils but I have still some way to go. I kind of lost the patience with my entry halfway through and this reflects a bit in the finished product. This inspired me to do better next time.
So all I can say is good job; this is defenitely one of my favourites so far! :)