This is really coming along, I'm very impressed. The career mode is great, really good work. The one thing you might not have considered is making another difficulty that has a mix of AI racers. The reason I say this is sometimes the legends are way too fast and the beginners are way too slow, and the pros just clump together. A mix of them would also mean I would have to really fight for first but also shouldn't come last much. Hope this is useful feedback, keep up the good work!