Interesting MarioKart clone. I totally stuck at Rainbow Road though, so this was way too hard for me XP. 3D in GameMaker is crazy!
It's kind of hard to tell the difference between the fields by the names, but maybe it's because I died too early and gave up before I hit the interesting features.
Also, maybe I would have done better with a controller.
How long did it take you to make the complete game from concept and to this point? Did you create all the art and music yourself? Are you a solo dev?! Are you a self-taught programmer?
As a starting GM dev, I'm just wondering how long it took you to learn all of this., especially since you are dealing with 3D. O_O