okay, to get the stage six easter egg, just type "MELLON" in front of the door instead of "FRIEND"
Also, there is no way to beat stage 31. its a secret stage and technically its not even really a part of the game, its just an add-on. There was a Stage 31 in "TiToLToo," (this is the onlt level too) and there was no way to beat that one either