Unlock Level Select and Cheat Menu
From the main menu press:
L1, R2, L2, R1, CIRCLE, SQUARE, TRIANGLE, TRIANGLE.
Next press and hold:
L1 + L2 + R1 + R2.
This will bring up the level select. Choose your level, then during gameplay
pause the game. Select Cheat Option. You will see a list of cheats that can be
opened by collecting icons throughout the game.