That’s very helpful Soundtrickz, thank you so much for the tips. Oddly, I actually intentionally ensured some of those higher notes stood out more as it seemed to fit the tune, but maybe I went a little too far with it. Since submitting that track I have learned more about mastering, EQ, etc., particularly for piano (as piano is something I can actually play to a limited extent). I’m working on a new version right now.
Thanks again, you’ve helped motivate me to keep going. All the best. 