The string pizz. reminded me of this. It's kind of unrelated, but you might dig it if I haven't already shown it to you lol
https://www.youtube.com/watch?v=1dPpbYlW0pQ&list=PL1649A3A736810FFC&index=4
This is really cool, I think the instrumentation is wise as well. It doesn't have the sense of wonder like the Donkey Kong music, it's more foreboding to me. Maybe like exploring the wreckage of a sunken ship, or scanning for alien-like creatures at the depths of the ocean floor. Very mysterious and tranquil, but still the sense of danger.
I think the lumatone gets a bit repetitive, maybe it's just me? I suppose some spots you could crank the dynamics way down, or break up the flow of it during one of the string parts. I'm just imagining it being looped, but if it's background enough I think it works. The part itself IS very cool, it really works with the microtonal writing. Idiomatic and picturesque.
Just initial impressions! I'm still not convinced of microtonal music, but I admire your journey and like your writing style with it. 🙂