Well to start, it certainly is dark, but I'm not really feeling any chills from it, but that may just be me. I think the snare strays away from the dark creepy feel you were going for, mostly cuz its rather too loud and present. What I, myself, would do, if adding in some sorta percussion to a song who's theme was of something eerie, is have the drum be more subtle and low volume. The piano sounds awkward against the strings, like you might'v been trying to play in a minor note but didn't quite make it. The melody feels kinda weird. It's not really going any where, disorienting almost, and with the beginning melody repeating the way it does the whole song feels rather like it's going in a short disoriented circle but all that may also just be me being harsh and critical... or it may not! You decide! I'm not trying to discourage! :P
THank you. To be fair, I was utterly lazy with the violin instruments. I'll try updating this in a while.