A camera chase with no pretense.
Okay, so they're racing. /Why/ are they racing? Why did all these characters from Cartoon Network and so on gather to do (M/W)ario Kart? Did you consider a story? (Perhaps I'm missing something in not seeing the first one? Never mind, I just did...)
The scene seems cluttered. Reducing the size of the pickup icons might help. I sense an imbalance of quality; the grassy field and the track look worse than what's driving over them.
I'm guessing you created this race as one big Graphic sequence and then tweened it around to simulate camera movement? If so, you've got my respect on that.