If you're wondering why the project is too laggy, it might be because the entire track is being rendered by just one sprite instead of multiples. This is Mario Circuit from SMK used to see what the Pencil extension can do. You can use the arrow keys to make Mario turn left and right, but that's pretty much it. Just watch.
I made this pushing my laptop's limitations, so someone might see it laggy. If you do, use Turbowarp. Credit to Nintendo for Super Mario Kart, and credit to the spriters resource for the Mario sprite.