What is the fastest song? Also there should be a level only speedrun. And by "level", I mean just 5star% speedrunn for each song

i made a discovery i think i found a skip in the gauntlet dark legacy speedrun alright, so i was beating the dragon in the fire realm.after i beat him, i collected some meat as i started fading to the shop screen. and instead of going to the shop menu, i just ended up it the overworld. skipping the shop and collectibles screens. i was playing on the GameCube version

not sure if this works for other boss fights, or on other platforms.