Wow! I'm impressed. It sounds like you may have studied the Holy Minimalists; Arvo Part, John Tavener, and Henryk Gorecki.
In the first 16 measure double period, I can hear the same period repeated twice, with different resolutions. Then in the antecedent sections, it sounds like you modulate in order to exploit your lower, and then your upper range (I take it as the exterior and then the interior self crying out). I then lose track of what is going on in the loop, which is a good thing because it's obvious you want to create a desolate, meandering, and longing atmosphere. As the loop progresses, I can hear you using the same motif, to anchor the piece, but I will have to listen to it again to figure out exactly how you extrapolate it. I will also have to listen to it again to fully appreciate the interaction between the loop and your layering.
I wish I had time to listen to it again, so I could write more, but I have to go now.
