Unlock Everything:
Enter BALLOWAX as a code on the Enigma to unlock everything.

Unlock Levels:
Enter the corresponding code on the Enigma to unlock levels:

Level 2 - EAGLE
Level 3 - HAWK
Level 4 - PARROT
Level 5 - DOVE
Level 6 - TOUCAN

God Mode:
Pause the game, and press B, L, B, R, Y, L, X and Down to unlock God Mode.