Hey, really solid game! You definitely have a good idea here and I think it could definitely become something bigger with more time.
Biggest feedback I have is just that the controls need a bit more tuning and polishing. One thing I'd recommend is to not use the same joystick for turning the car and making it go up and down. There were times when I'd like to do both at the same time, but just couldn't. And maybe a speed gauge so you can get some visual feedback when you're speeding up/slowing down. Sometimes I couldn't really tell if the car was moving how I wanted it to.
But the idea of the game was really fun! I really liked the vertical aspect of the game, and having to go up and down. Reminded me a lot of the "car chase" scene in the 2nd Star Wars movie, when they're racing around Coruscant! Great job!