I hear a little bit of dissonance that doesn't sound right around the 30 second mark I think? Also, I think the saxophone could be mixed a little more properly; it stands out to me as being "different" from all the other instruments (I think maybe you could apply some sort of cut to the highs on the sax? But this is probably not a good suggestion). Otherwise, really nice melody and progression, maybe could be a bit more varied but I'm personally very content with it as-is. Great job!!