BEAUTIFUL CONTROLS! :D
But it NEEDS a mouse-sensitivity slider.
I have a gaming mouse where I can reduce the sensitivity with a button, but without this it would be very hard to play, with eg. an basic "office mouse".
I would also recommend making some kind of "sensitivity testing & tuning" level.
Eg. ask the player to click & drag the mouse for whatever distance they feel would be 180 degree turn, and calculate what to set the sensitivity to for that to be 180 degrees.
Still keep the slider as an option for additional fine-tuning.
It would also be fun with some "racetrack levels" where you just focus on going fast, there are no walls & fuel to worry about.
There is a green line to follow, on each sides of that line it fades into orange & then red, each of those zones give less (or more? like golf score?) points per time & speed spent there.
Also, a map would be nice, to find where the pick-up stations are.
Or maybe a color-coordinated (each active (discovered) destination has a colored underscore line?) pointer arrow towards each active pickup station, just like what the cargo crate has.