Awesome, and thanks for even thinking of it! ❤️ Even if the game will be identical to the C64 version, a native C128 release would still mean a ton. It would recognize and acknowledge the C128, both as an 8-bit platform of its own as well as its community. In fact, I'll go as far as saying a native version of New Rally-X64 would be a milestone for C128 action games 👍.
Again, thank you for listening and best of luck if you decide to build a C128 version - really crossing my fingers for it!