This is nice work; very smooth and positive vibes, even with the melancholy feel. I like the way you start off with a single note and then build and layer everything from there. Good use of complimentary melodies, tones and textures... A finely balanced piece. I do find myself wondering to where those melodies could explore, if you were to try risking a key change or two... Of course sometimes doing that can cause a loss of focus that can only be regained by resorting to cliches - so maybe your judgement was correct in this case.
I can imagine listening to this while driving at dusk, similar to the image shown. All told it sounds like you accomplished exactly what you set out to do.