There is only one way this could be any better...
This is amazing, beautiful, superb, outstanding, etc etc. I love every second of it! You did wonderfully. However, as cliche as this may be, this woulda been pushed to 10 if you would have ended it with the SMB1 "Game Over" tune (ala BrentalFloss). If that would have happened, I most likely would have gotten chills. Regardless, this is a stupendous piece. Keep up the great work.