Its great, I love the goombas part of the chorus.
My god I'm sure I 've never heard of you but i'll have too look out for more work, this movie has been made my favourite and should stay that way for quite a while. I really loved the animation style and the song is sooo catchy and enjoiable.
The only things I don't like (Im a crazy mario fan by the way) is that yoshi shouldn't have a shell, but a sattle. And bowsers voice slowly changes.
But otherwise this is easily the best animation I've ever seen!
Keep up the excellent work.
-Ed