After the game loads and the Push Start screen is showing enter the following code:

TRIANGLE, LEFT, RIGHT, TRIANGLE

An icon will appear in the upper-right hand corner of the screen indicating that you have unlock more levels. You can find the extra levels by selecting Puzzle Mode then selecting Arcade Mode to get more puzzles.

After the game loads and the Push Start screen is showing enter the following code:

TRIANGLE, RIGHT, LEFT, TRIANGLE

An icon will appear in the upper-LEFT hand corner of the screen indicating that you have unlock more characters.