It all depends on your taste.
In the opening chord, if there are no words, I would try to split the alto (or use the soprano + alto) in an interval of a second C-Bb, not like a trill, but long notes at the same time.
Was a logo established for this yet? I have been away from this website for a while focusing on college and just seen this advertised. I am finishing up a Bachelor's degree as a Graphic Designer and would love the opportunity to design for Young Composers. You can view my portfolio here: http://karisalclark.wixsite.com/karisalclark/portfolio
If you are still searching for designs or need help coming up with ideas, contact me through my website or reply to this post.
It's not something I would ever listen to by itself, but I've had it on in the background and I really love the atmosphere of it! I don't know anything quite like it because I don't tend to listen to this sort of thing much, but one thing that does definitely come to mind is some of Tangerine Dream's early albums: in particular tracks like '3 A.M. at the Border of the Marsh From Okefenokee' (https://www.youtube.com/watch?v=MEgphCcN-ak).
Before I listened I wanted to say that ten minutes is too long for a track you want to get feedback to.
Now I'm sorry that it stopped, I wasn't ready.
Please make more of these ^-^