Tak and the Power of Juju Cheats

Enter the codes during gameplay, then quit to see them in the Extras menu:

[Square], [Triangle], [Circle], [Square]. [Triangle], [Circle], [Square], [Triangle] - 100 Feathers
[Up], [Right], [Left], [Down], [Triangle], [Circle], [Square], [Down] - All Juju Powerups
[Triangle], [Triangle], [Square], [Square], [Circle], [Circle], [Left], [Right] - All Moonstones
[Square], [Triangle], [Circle], [Left], [Up], [Right], [Down], [Down] - All Plants
[Up], [Triangle], [Left], [Square], [Right], [Circle], [Down], [Up] - All Yorbels
[Left], [Right], [Square], [Square], [Circle], [Circle], [Left], [Right] - Unlock Everything

Unlock Concept Art
Collect all twelve plants to unlock the Concept Art, which can be found in the Extras menu.

Unlock Movies
Once you see a movie in-game, it will be available for viewing in the Extras menu.

Unlock Story Boards
To unlock the Story Boards, collect 200 yorbels.