Background music
Overall: It's a beautiful song, even if it's really long. But honestly, it seems like background music. That isn't a bad thing; I like background music for a lot of reasons.
Critique: You're shy of a ten because you had the same drums throughout the song. I could tolerate the same instrument throughout the song, because it sounded fine the whole time. But your drums are overshadowed by the instrument, and it seriously downplays them.
You could fix this by changing your drum instruments every lead pattern change, or maybe even raising the volume on them a touch to make them noticeable. Maybe it's only me, but it bothers me when I know drums are there but I have to pay attention to hear them, especially for a background type song.
Otherwise, very well done! 5/5 and 9/10