Improve this one? It's already quite good and reminds me of Super Monaco Grand Prix from the Arcades. Well, imagine approximately 40 years ago, there have been quite good 3d like games already on the C64 and super smooth as well. I played Pitstop 2, Super Cycle and then there was The Great American Cross Country Road Race. Really cool games on the C64 for that time. Good luck with your projects!