Attacking the room's giant Jellyfish with spears crashes the game.
Swimming past it, entering the room's second screen from the left freezes the game
(coming from the right side).
(No Remix)

Update: And WRFA_A03 just freezes.
(Leviathan always eats the other Giant Jelly Fish in E02 before I get past, tested three times, don't know if related)