How does completing world 1 alone qualify for a full "Any%" run? Shouldn't it be all 8 worlds of the game?

the game restarts after you beat the last level

i don't know much about the game but that still doesn't make sense. Infinite Mario Bros has a end in World 8. And as the worlds progress they add different things to make it harder like bullet bills. When I did my play through of it I went from World 1 to World 8, and the game ended and put me back into the title screen in after finishing World 8. How are there only 1 world and wdym by "restarts"

oh, by restarts i mean it just generates a new world. i didn't know it had an ending. guess i took "infinite" too literally. sorry about that! the leaderboards will be updated!

Also btw why are the World 1, 2 3, 4, 5, 6, 7, and 8 category separated and not just inside of Any% also, Why does World 8 exist? isn't that just any%? Same thing go's to 100%