To add a piece on to the bad ending you have to make sure your money total is $0 by the end of the game. Playing under normal mode and not getting any adapters may also help. Buy a cake and mojo doll to waste the money collected after a country. Also waste a cake before defeating the Boss. If money is accidentally collected, fall down a pit or do something else to start again (usually from Launchpad or the Boss). When the game is completed with a $0 total, you will see Glomgold titled as the greatest adventurer.