I really enjoy this! I like how it starts out a bit slow at the beginning with the humming, and the build was very nicely done. I also like how you have your own take on the song, not just a carbon-copy of the original with mediocre instrumentals and beat slapped onto it. Also, the flow is very nice. It keeps a nice, steady tempo and doesn't go all over the place.
Overall, very nice job. The usage of voices was great, with the humming, and the yelling of "Mario!" at certain parts of the song. You've made a Luigi fan proud, my friend. :D