Great job!!
I was a bit confused because I didn't expect for cars to run into each other after they had already looped, I thought that if they had done a loop together that then that meant they were safe? But then I realized that I suppose if they finish faster, then they start the loop sooner, meaning they're becoming offset from each other and therein lies the risk. Really interesting the mechanics that fall into place simply by "looping" them, you discover behaviors you didn't predict!
Really fun game and I especially was jamming to the music the whole time :)