Lovin' Machine %
I've been thinking about what it would be like to speedrun this game for a while now and I think I've got an idea for it.
If the total score dictates your rank, I figure that a single high enough score on each stage would be enough to unlock the highest rank. So what if there was a category to get to the Lovin' Machine rank? This would be a category that actually requires playing well to get a good run.
It's been a while since before I casually unlocked Lovin' Machine, so I'm not sure if I'm correct about how the score works. I'd do some experimenting myself, but I don't want to clear my save data.