Encountered one problem and have a few suggestions:
Problem: Can't change settings via in-game options, always have to do it via the INI.
Suggestion 1: move game data to the game's folder, if possible (it's good to have a portable variation of the game, ya know)
Suggestion 2: add features to improve steering. Example: if you keep tapping Accelerate while steering you can make tighter curves more easily in most games. Additionally, add the attack left/right by double-tapping left/right.
Suggestion 3: add a way to configure the controller in-game.