The athmosphere is really nice, and it's a nice song. I like the round-ness of your sound as well.
I think it could use some more expressiveness and dynamics. For example, at around 1:32 a theme is re-stated with a nice and full arrangement, and it would benefit the clarity of the form ("listen up, I'm re-stating the theme!") and expressiveness if the music would swell some more.
I would also consider using staccato patches in the strings accompaniment starting at 00:32.