It was simply amazing.
Yes, an animation of this magnitude takes astronomical amounts of work and effort. You pulled it off with expert quality.
There is not a thing you should change about this, and that you should be looking ahead to your next projects.
I was stunned when I saw the quality and fluidness of your animation. As this has probably lost all meaning to you, keep up the excellent work, and I can't wait to see what's up next.