This needs some investigation. Discuss ideas and findings on the talk page. Specifically: The level IDs 0x53 to 0x74 load levels even though the whole game takes place in level ID 0x03 to 0x52, find out if there is a hardmode or something or if they are unused/cloned levels. The following gameshark code can be activated in the main menu to start the level, XX being the level ID: 01XXD8D8
Mr. Nutz, later remade under the kooky late-'90s title Mr. Nutz.
Entering the password NESTOR allows the player to refill their nuts, lives and health by pressing Select and skip to the next level by pressing Start and Select together.
