A neat idea, love the inspiration! I think your arpeggios could use some mixing. Like maybe change the rate from whatever it is (sounds like 1/32) and change it up a bit throughout the song, or add some additional sounds throughout the mix to make things more interesting. The melody kind of goes on and on without any real break for the listener, plus it's 6 mins long, which I get if this is meant to be a Soundtrack.
The only other thing I can add is to try to add some FX or filtering to some of your sounds to separate them more in the mix. Everything is kind of at the same level. It would be interesting to hear some slow pans on your long sounds, and maybe some short, repetitive Left to right panning on your sounds with more notes (faster sounds, whatever you wanna call them). Hope this helps! Great job!