I really like the piano! In terms of orchestration I would add high strings to the woodwinds and later to low strings. the rhythmic parts played by the brass may be intensified not only by strings which is great, but by percussion as well, which will add intensity. Also, the piano plays all the time. May be it would be better to give a melody to other instruments like strings and then back to piano.
Julia, thank you for your feedback.
I changed some parts. I added some high strings, let the melody now play by a guitar too, changed the brass a bit and finally added some percussion, risers and hits.
Just have a listen
Its so wonderful to learn, thanks a lot for any advice or tips,