I was looking in Championship Edition DX's speedruns and saw a score attack speedrun. The rules were "Timing ends when the score hits the score goal. Your time is the amount left on the clock." and it made me wonder if S or A Rank speedruns could be added.

We'll see if we can get those in, though most of the Area 6 levels are based on score attack with a 5,000,000 point goal.