Hello Titanicnut812,
I regret to inform you that your map is being rejected.
The theme is a bit unoriginal, as we already have a few Mario Kart related maps. However, none of them are of this course.
The build is a bit plain as it is flat, so try adding some more shape/structure to your build. Also, try using different types of blocks to give it some variety.
The parkour is quite repetitive with wood blocks being most of the parkour, so try incorporating some different jumps throughout your entire map! This may include; water, lava, heads, vines, and many more different types of blocks depending on your theme. The length of this course and difficulty of the jumps are good for the medium difficulty.
Thank you for submitting this map, I would love to see more submissions from you!
Have a nice day,
Kristina