Arthurtilly (swampy level - course 1)
GGmand (whomps lava castle - metal cap)
ArseneSR (soda caves - course 6)
InTheBeef (new mario model)
miles gaming (rainbow road/planet 1? - rainbow clouds area 1+2, and hub area 3)
Daniel_EDC(2D challenge - rainbow clouds area 4)
cheezepin (pacer - rainbow clouds area 5)
Unfortunately the sound is broken in cheezepins level and wasn't included
because it makes zero sense without it :(
somebro (unnamed level - rainbow clouds area 6)