Great
Very great submission. Over 6 minutes long and it doesn't get boring for one single second! Yes, this is only the first part, but I don't think that the second part will get boring. ;)
I like how diversifyed this song is and I like the wide range of instruments you used here. This makes the song very intersting to listen to.
However, I think with vocals this song would sound even more awsome. I was thinking of some vocals like Opeth uses. Some parts with clean singing, other parts with deep growls. It would fit pretty well here, I think.
Anyway, I still rate this 10/10 and 5/5. :)