I agree, fantastic. You've made a lot with just a little!
I don't know if you'd consider an add: a very high pitched string (violin or such, or synth string) playing an "E flat" way up top, holding it, sustained. Mixed in medium to low volume. Total background. It's hinted at in the intro (:19) but I don't think I heard it proper in the piece itself? Just an idea, which are like elbows, everyone having at least two, barring mishap.
Loved the chill ear candy throughout!
-Tom