Dude:
Creating PDF files with GhostScript
I can't see the score in .sib cuz I got an older version (I hate sibelius 5.) So for next time, a PDF is fine too.
If this is the same thing you showed me, it's better than when I saw it. Say, what organ soundfont were you using for the mp3?
And, y'know, this reminds me a LOT of medieval music or chanting... I don't know exactly why but there are moments where the harmony bounces back and forth as if you were making parallels so I get that impression. Plus probably the melody is so old-sounding~
This sounds a lot closer to Buxtehude than Bach though, which isn't a bad thing really.
... Oh wait, you DID write parallels. That's the sound I was talking about, hahaha. Hell, right at the start with the chords you have like, 5 5th parallels in a row. I like how it sounds honestly but Bach would have never done it like that, nor Buxtehude as far as I know. So, depends on what you were shooting for. I like them parallels.
Either way, I don't know what you intended with the monody-like ending, since you don't return to the tonic, there's no cadence, hinted or otherwise and it just seems like a fragment or something unfinished. (in fact it reminds me of Bach's unfinished fugue in kunst der fugue.)
I'm not sure what style are you going for, if I didn't know better I'd just say this is a sort of modern/old mix piece, since a lot of stuff sounds either very very old or neo baroque/modern. Hell, you could've gone even further and added more dissonances, rhythms and other techniques to mix it up even further.
But as a recreation of style... well, which style? This is closer to Buxtehude, but the piece doesn't seem to have any structural togetherness that would hint at composers from that time (though I wouldn't compare Buxtehude's structures to Bach's...)
Without all of that, it's pretty neat and all (parallels~), if a little uncertain/?.