Codes:
LEADWORTH: entered at the beginning unlocks an Ood
SLITHEEN: Unlocks an Ood on Level 4
CYBERKING: adds Oods to Level 6
CYBERMAT: adds an Ood to Level 8/ saves the Ood from the Silence
MELODYPOND: saves the Ood from the Silence in level nine
MESSALINE: unlocks Ood in level 10 and gives extra points for rescueing them.