I think Calamity Mod Low% (Killing SCal with as fewest bosses killed up to that point) would be a cool addition to the leaderboard. It would push change the route of the game by a lot since Calamity makes a lot of the bosses optional.

https://www.google.com/search?q=full+screen+japanese+google+doodle+champion+island&rlz=1CAWPBA_enUS881&sxsrf=ALeKk00SxFGyfo5M5g1mtLitz6CFbVxMAw%3A1629854034267&ei=UpklYfLhD8Gz0PEPpfa1wAU&oq=full+screen+japanese+google+doodle+champion+island&gs_lcp=Cgdnd3Mtd2l6EAM6BwgAELADEBM6CQgAELADEB4QEzoGCAAQBxAeOgQIABAeOgYIABAIEB46BQghEKABOgcIIRAKEKABOgQIIRAVSgQIQRgBUP0YWPV2YLR6aARwAHgAgAGfAogBth6SAQcxNC4xOS4ymAEAoAEByAEDwAEB&sclient=gws-wiz&ved=0ahUKEwjy0v21_8ryAhXBGTQIHSV7DVgQ4dUDCA8&uact=5&safe=active&ssui=on

Click on the first blue button. Idk what version it is but I know it is pre rc7