One Dimensional :(
If it had been me, I would've started with a stronger Bowser melody to really pull in the listener. A medley is hard to execute properly, and recognition is key--so I would've immediately started with one that everyone will remember. I also think the piece didn't lead many places. There really wasn't a climax because the beat and instrument levels stayed the same throughout. And you had an epic opportunity to take it right to SM64 Bowser's World with chords alone and no beat, but you dropped the ball and it made me sad.
Simply put, I had a hard time getting this to keep my attention. But you did a good job incorporating them all together. So some points for that.