Great idea for a mechanic, would love to see this expanded!
I had a bit of trouble distinguishing the yellow and orange speed states though, sometimes the barriers looked like they needed yellow speed but ended up being orange. I agree that widening the roads a little bit, even just at the beginning, would make it a bit easier to get to grips with how the car handles.
Also, the option to skip the intro would be nice, but only because I accidentally closed the game twice and had to sit through it again.
Overall, a really solid entry, spend a lot more time with it compared to other games. Good job!