I really like the timbre of the piano and the guitar in this mix. The harmonic progression is also pretty cool! It sounds beautiful. I’m curious to know how the strings (from the intro playing the melody in unison with the piano) was replaced with one solid lead Violin or Viola playing the melody with the piano. Maybe even a subtle snare? (Check the snare from Empire Ants by Gorillaz) If you want to tweak it more you dont have much to do much because you have a great foundation. (Instrumental, and arranging wise) keep up the good work! I wish I could comment on the mix but mixing isn't my strongest suit.