If I'm honest, there isn't really anything for me to critique (considering that I'm shit at criticising stuff) but goddammit, I'm gonna try. I did notice that the singing did seem more clear around the end of the song which kinda put me off a little bit (I'm not going to let that affect the score I'm giving though). I can't say much about the animation because I know nothing about animation.
all in all, good and good in my opinion