Contemporary Jazz?
Not even sure where to put this... it's an interesting enough piece.
At 0:57 there's a brief moment of dissonance, and various bits after that... I don't know if it's a style choice, but it seems odd.
The instrumentation is questionable... and chords probably should be wider at parts. At some parts, it sounds almost like some modern slower jazz piece... Regarding instrumentation, it's all over the place. Some parts sound like they are too high for horn (if it's jazz, it probably shouldn't have horn and the part should be played by trumpet) and should be on flute or such... Also, the brass seem distant to me while the guitar seems close... it's probably an issue only with the sounds, but it's unsettling. Some more percussion... a traditional kit part would be fitting. This is much more jazz than classical theory wise, to be honest. Some more chording (instruments backing up the melody with the tonic and other chords) would be nice in some parts, and other sections have instruments moving too much, creating a disjunctive feel between chords.
Theory wise, it's interesting and unorthodox (not a bad thing). I can't really comment too much on it...
All in all, a lovely piece.
Keep up the good work!
-Samulis