Wow, I've really neglected some of the more advanced race circuits. I had no idea they got this cool. Played Leaf Cup and I'm a little blown away.
The first track has Magickoopa fly over it periodically and casts a spell on the track that flips your camera, and for the life of me, I have no idea how it even works. It's like it flips my apartment around and all the turns are backwards. How does that even work and not mess up the driving? It's such a cool effect the first time you see it, and I was totally disoriented.
Then the second race, you're in a jungle surrounded by Pirahna Plants that spit slime on the track that blocks your vision. The gates have horizontal warp pipes that shoot item boxes across the gate track lines, so it's harder to get items.
Then the final track is Gusty Galaxy, and you're on this dark brown mars-like terrain with extreme wind. And I know it's something people have seen where the wind effects the real car, but when you actually play it, it's just so impressive that it actually works. All the coins on the track and all the item boxes are just scattered and flying across the screen with the wind, and your handling is massively altered. I crashed into walls and objects multiple times, and it was a ton of fun.
I can't wait to see some of the other software enhancements. I've only even played 2 of the full cups, and have just mostly been experimenting with my own track design stuff.