Interesting
Well I wished you had posted the lyrics for us to read first of all. The vocals sound good for the most part, and the lyrics sound creative from what I can hear.
The guitar part wasn't bad for the most part. Probably the greatest part about the song is that you added additional vocal notes over the top of the track, which sounded really great.
The only hole I really see from the song is any form of percussion - so if you're looking for something to add, I would definitely start there. Then if it still feels empty add a bass line to it.
The piece you have here is certainly a great start though, and it doesn't sound bad at all really. It's certainly one of the more original things I've heard in the audio portal, and I commend you for doing your own thing.
No comment on the scream at the end, lol...not sure that really belonged.
Overall a decent track. Keep up the good work, and I'm interested to hear what you end up adding to this.