There were a couple issues I needed resolved before I really could move forwards with Sonic R hacking. 2 things, mostly. 1: slogging through the menus every time I wanted to test a character or level change was an absolute chore. And 2: I needed a quick and easy way to edit the character and course select screens, or to add debugging screens.

Attempting to just fix Sonic R's existing menu system would have been nightmarish (it's really just a giant pile of spaghetti code when you get down to it) so instead I just threw the whole thing out and started anew.