Well that is an unusual set to make an alternate of, very cool. You have some great parts usage. Really need to get back on the pages myself, got lots of new stuff, but haven't gotten around to photographing most of it.
Aesthetics: 7, neatness: 7, parts usage: 8, idea: 7, other: 7 Total 36/40. This is the first non-Creator alternative in this contest, and I praise you for that! It definitely gives some extra challenges, because the parts are not as versatile to create a cohesive model, but still you've used them in a nice way. Not sure though if I would like to drive a kart with a handle bar instead of a steering wheel... ;)