There is a category extension called "All-stars All stars" And the rules for the category don't really explain anything so I'm asking what the point of this category is.

Just watch the WR to see what he dose

I think you have to get all stars in the entire game on the all stars version of the game

there are no runs. and you mean get all the star power ups in the levels?

The rules for the category have been updated and clarified after your request.