I wrote this as I developed the game's submission run, so the instructions may be a bit crude, but you'll understand it if you're reading it as you play.
- Cave / Open Mic
go directly up and right to get sword, ignore box
go right and skip all boxes, go up through hole in wall to box room, get to ladder
box in the bottom left has the key, grab that and return to the hole in the wall
go down and attack the steel door
attack each dining table to spawn the ladder to the next level
- Caldera of Confusion
hit fire back at enemy and go down ladder
go right and keep heading until the golden room
go into second golden room and go to the left
hit the fireball back at the statue
enter ladder in golden room
fuck you, grass section
- Fortress of Misfortune
run all the way down and let the bat pass you (99% certain it cannot be outran)
literally just run down the hallway and don't stop (and don't clip walls)
hit pillar and then stand in the symbol
go right, continue right, go down, go right, go down, continue down, go right, go down, go left, go down, go right (you're trying to get to the bottom right corner btw)
stand on the black/white checkered tiles and go down ladder
play ddr and get a 150 note streak (note directions are random each attempt)
you win