Well there's a problem with this song...
Not that it is bad, but it's pretty good. There just... just too much room for more than was is presented. There could be so much more.
Now, when I hear this song... definitely to me, and others probably as well, they could remix this and change into someting completely different, and could probably fit your wanting of this to be halloween-ish.
I hear this, and I can definitely hear a drum and bass remix coming on in my mind, if you don't mind. This are like one of those songs that people put out there just so remixers, like myself, could want to remix, not that that was your intention.
But personally, I would love to remix this song. There is just so much missing and so much to be filled, even with it being an ambient like song. It is pretty well done, but I think you can do a little bit more with this, and probably achieve your halloween feel in the process. Nice track. Good job.
~[IZK]