Being more of a novice, I would love to hear some feedback!
A fun piece! The sound that can be achieved with mostly free libraries is quite impressive. If you want some constructive criticism, the piece keeps introducing new material and doesn't repeat any themes, which is a pretty common problem I hear with newer composers.
0:00-0:17, good start with the horn theme (Part A), then through to 0:30 with a nice Part B to complement it. Then at 0:30, it switches to an entirely new thing, a Part C. At this point it's starting to lose me, but I'm still on board if I get some payoff after the buildup.
But then it builds to 0:56 and to a new Part D. At this point the piece has "lost" me. My brain was hoping for a satisfying reiteration of Part A to bring the track full circle.
There's no hard and fast rules about the structure of a piece or the balance between novelty (ABCDE) and repetition (AAAAA), but leaning too far in either direction tends to make most listeners lose interest.