On the Level Select, play the following music tracks on the Sound Test to enable special features. A confirmation sound will be heard when the correct order is played.

Code	Effect
01, 09, 07, 09, 00, 08, 01, 01	Changes all small animals to squirrels.
01, 09, 08, 09, 00, 05, 00, 01	Effect unknown.
01, 09, 09, 02, 01, 01, 02, 04	Infinite continues.
02, 00, 01, 07, 00, 08, 01, 05	Enables flight when in Super form (double-tap jump)
02, 00, 01, 08, 00, 06, 02, 03	Start game in Encore Mode (DLC required)
04, 01, 02, 06	Start with all Chaos Emeralds.
06, 02, 01, 04	Disables Super Sonic theme when transformed.
09, 00, 00, 01	Enables all special moves for Sonic (Drop Dash, Insta-Shield, Peel-Out)