Pretty damn good
An excellent tribute to the greatest game on the planet. There are a few ways to improve this, at least in my opinion, so let me skim over those:
One, try cleaning it all up, making everything a tad crisper.. especially the voices.
Two, I noticed a definite difference in the voljmes of the music versus the voices, so try to tone the voices back a bit, or the music up a bit.
Three, and this is the thing that bugged me the most, was that when the 'veni, veni, venias' was going, it stopped to let the 'glorioso, generosa' part go... but the original didn't do that, but rather overlapped them.
Four, try teaching those sopranos slightly better breath control :P
An excellent go at a legendary song, I hope you do more music like this in the near future. Please think about I and others have said, eh?