Well, I'm glad that someone got the reference. I would really like to include KITT in the game, along with some additional features like turbo boost and ski mode. However, I don't have any sprites of the car, so it won't happen soon, sadly.
I just watched a Youtube video of a low-res reshaded version of the game. When I saw Dagger DX on the car select screen I was like "Wait a second, that's from Knight Rider!" Very cool nod! I hope you can add KITT eventually, although the game is great as is!