I mean, it looks amazing, of course it does! And the music work is soo awsome too! Works hella well with the animation itself, more than in most cartoons without being fully dedicated to it like a music video.
I don't really get the plot though? Why did the monsters need to get masks, and why didn't they destroy the floaty blue thingies earlier, since humans don't live there and the floaties are probably from long ago?