It sounds like the introduction to a song or the sketch of the instrumental parts to a song. I was expecting a Corry Tailor in stone sour guise voice coming in at some point. Maybe a way to take it to develop it a bit more.
Good work! I try to find something wrong in composition but congratulation -nothing .All sound good only its to short. Develop the orchestra and sounds in part like*middle*(next of this part) and come back to this part, like *reprisa*.