It took me an embarrassingly long time to figure out how to move left/right since acceleration was tied to z and those controls aren't listed with the others. I'm not really sure how this relates to the theme but it's well done, especially including a leaderboard!

Great job on this, I had a lot of fun with this one

My score on the first track

Nice game. Drawn skids on road were nice and being able to see and race against my ghost made me want to play again a few times.  Leaderboards are good for this replayability as well. Even after a bunch of tries I couldn't get close to those people in the 7's though, looks like people out there are much better at this than me.
One small issue I ran into is the accelerate sound kept playing when I went back to the previous menu. Also, connection to the theme is pretty indirect.

Well, it was a nice game, but the relation to the theme was not very good....