Level Select:
While at the title screen press Up, Down, Down, Left, Right, Space. Note: Only a single level
may be completed each time with this feature enabled. 

Development Team High Scores:
While at the title screen press Right, Right, Up, Up, Down, Space. 

Cheat Mode:
To enable the sound test screen and chat mode press Down, Down, Down, Left, Right,
Space at the title screen . Enter and play one of the corresponding sound combinations to
activate the corresponding cheat function. 

Function - Sounds 

     Debug mode - PCM12, DA11 
     Bonus levels - PCM07, DA07 
     Display artwork - PCM03, DA01 
     Human-faced Sonic - PCM12, DA25 
     Hercules Sonic - PCM04, DA21 
     "Revenge of the Mutant Artwork" - PCM11, DA09