while redundant to the current dpad arrow controls, it would be helpful if pressing A on the gamepad moved from the top category selector to the first available configuration option. Likewise, pressing B while on any configuration option should move you back up to the top category selector.
Either Start or Select should also mirror Y.
These additional control options should help make moving in and out of these menus more intuitive.
Absolutely fantastic gameplay experience. One of the best arcade racers I've ever played, including the originals. I didn't immediately understand that turbo stops on its own after a predetermined amount of time. If that's to stick as close to the original games as possible, it's fine (easy to figure out with a little experimentation), but otherwise I have no notes. Awesome work.
A nice-to-have extra touch might be to allow the engine to cool down slightly faster in rain and snow. But that's all that comes to mind. Can't wait to try out future updates. :)