Wow!  This reminds me of a classic arcade from the mid 80's.  Yes, that's how old I am.  It took me a sec. to get the hang of it (like any good arcade game).  And, then I mastered it with a score of 30.   The layout of the play area and the screen wrapping is clever and interesting to play.  Do you use Brfx for your SFX? 

Well done !!

This is a really fun idea. I think I found a bug though: the cars don't seem to despawn when they leave the play area, so you can drift into them off screen and get a ton of points (at least, I think that's what's happening). It got me about 53 points, but I don't think that really counts . Before that, my high score was 26-ish, so that's probably better to go off of, haha!

A lot harder than it looks! Really like the idea tho :)
Maybe an improvement would be to use D to drift clockwise