Cool title, and a neat premise! :)
If I may add my two cents: I imagine the hallway is in a castle with a very long carpeted floor, stone walls, and armored mannequins. It's got that "old-world-haunted-castle" tinge to it, IMO. Think Masque of the Red Death by Edgar Allen Poe. If you don't like his work, please take what I said as a complement, as I mean it as one. The imagery you create is very interesting.
The only flaw see with this is technical. The song ends quite suddenly for a song that doesn't loop. I recommend changing the ending or at least editing the submission info, changing it from "Song" to "Loop."
I hope this feedback is helpful. :)
More info about how I review music here: https://codefreq.newgrounds.com/news/post/1089806