I also found an absurd graphical bug that caused one specific room to overlap every other room in the game, which kind of fit the aesthetic of the final phase. If it wasn't intended, you should definitely make it so.
This occurs at 21:17, i pressed S as soon as i got in the room, which i abuse when the movement cooldown doesn't occur and allows me to move immediately before the room loads.
Em Em still causes interaction issues. 13:55, flashing the room in the ghost room causes em to get hit, but keeps my interaction locked, this occurs when i am in the left pumpkin room as well, flash hits the adjacent room somehow.
Having Em Em, Bubbely and Ghost in the main lobby causes only Em and Bubbely to get hit by the flash while the Ghost remains untouched.