Good hard earnest piece!
Okay. I Like it. But the Saxophone did get really loud at times. But that is okay and fixable.
But what you should really do is try to merge each note together. The sax just sounds like it is being blown for a note, then a breath is taken, then blown again.
Right now you have the sax going at 4 beats for every note don't you. That is never really very good. Try using a higher tempo and maybe 1 note per 2 beats if you want to keep the same tempo. And switch it up to have 1 note per beat and vibrato. Oh, and use your chords man!