Whoa you have stuff in here (around 30 sec in) that sounds like the episodes in a Bach fugue. That's pretty funny.
You obviously are strong compositionally, with good general knowledge of harmony (such as the bVI - bVII thing around 1:49) and an instinct for memorable section and instrumental changes which can be as obvious as the Penderecki strings leading to trumpet chaos into a very intense half of the music, or as subtle as the vibraphone doubling at 0:44 that gives the pizzacato part a bit more shine.
Very intentional and beautiful work. Definitely a contender for one of the best pieces here.