UPDATE: I ACTUALLY BEAT 10 LETS GOOOOOO
+ First try too :D
(Edit: I wanted to record my attempt, but snipping tool gave out on me)
in the "map" which is what i like to call the level select thingy in either episode if you hold down 9 you can skip straight to 9 aka level 9 where you fight final boss 9 where hit song final boss 9 plays
all previous levels get set to a unreasonable amount of time though so you cant get a better rank by doing it