Once you acquire enough Picarats, you unlock the following options in the top secret section.

Option	How to unlock
Additional Character Profiles	Solve all 168 Puzzles
Character Profiles	Acquire 4200 Picarats
Character Voices	Acquire 5000 Picarats
Game Music	Acquire 4700 Picarats
Movies	Acquire 5200 Picarats
Story Art	Acquire 4500 Picarats