I'm not sure why people are hearing shrieking. It sounds fine to me?
Anyway, after I heard that intro I knew I was in for a treat. It's always a good thing to start your song off strong because people today have very short attention spans. If you hook them early, they'll stay for the ride.
I love your style -- a mix of both nostalgia and new techniques. It reminds me of good DOS games I played back in the day with solid soundtracks, but with a modern mix and updated devices. Like I said, I love it.
I also love music that tells a story rather than music that is just placeholder and generic; and this piece definitely tells a story. Much like your earlier track -- Peaks -- the transitions are intricate and balanced well enough to retain my interest, while expressing the feelings and emotions behind a scene. The arrangement and writing is truly skilled in that each instrument has received enough attention that its roles are necessary for the track. In other words, I can tell you worked long and hard on each section of the music.
The instruments have a very distinctive sound. Like ChronoNomad said, relaxing and chilled. If there were any problems with them, then I wasn't able to hear anything. Overall I can say that the instruments are very easy on the ears and I can handle that.
I can see why this song appeals to so many people. Well written, well produced, and released with humility. I hope that you can continue in your success, as I see you growing further as well all are. Truly blessed.
-Jon