I actually like this a lot. It's very dark and plain. The simplicity really gives it the feel that it's located in a haunted house, or something. :P I also love the watercolor-like texture, I think it adds to the dark atmosphere.
I'm also curious as to what the medium was? Was it done by hand or on the computer? (I'm not a big art buff, so bare with me here :P)
I think it would look a little more appealing visually if the whole door/wall trim/floor were visible in the picture. Also adding some damage to the walls around the door would add character to this. But then again maybe the simplisity is what really makes these piece unique? Nice work, anyway, I enjoy it. :)
First ever art review, by the way. lol