Choose the Sound FX option and play the following sound sequences for the desired effect.

00, 05, 01, 03, 07, 00 - 25% speed
00, 04, 02, 09, 06, 04 - 50% speed
00, 04, 02, 05, 05, 07 - Sped up Music
00, 09, 00, 01, 06, 08 - Free movement (Pause the game and press 1+2)
00, 02, 01, 01, 06, 06 - Huge Sprites
00, 01, 01, 07, 07, 03 - Reset Mode (Pause the game and press 1+2)
00, 05, 02, 08, 07, 00 - Reset to title screen
00, 02, 02, 00, 06, 09 - Invert colors
00, 09, 01, 02, 05, 04 - Invert colors, sped up music
01, 01, 01, 01, 04, 09 - Scene: 1st Bonus Stage
01, 01, 01, 01, 04, 03 - Scene: And there comes Sonic and Tails...
01, 01, 01, 01, 04, 08 - Scene: Bonus Screen
01, 01, 01, 01, 04, 04 - Scene: Sonic, go ahead!!
01, 01, 01, 01, 04, 01 - Scene: Title Screen
01, 01, 01, 01, 04, 07 - Scene: Toxic Tools Boss
01, 01, 01, 01, 04, 05 - Scene: Toxic Tools Screen
01, 01, 01, 01, 04, 06 - Scene: Toxic Tools Stage
01, 01, 01, 01, 04, 02 - Scene: Veg-O-Fortress rising
00, 05, 00, 03, 06, 00 - Show year and version
00, 02, 01, 05, 06, 06 - Stage Skip (Press DOWN to skip stages on pause screen)
00, 03, 01, 01, 05, 05 - Start with 9 lives
00, 03, 01, 09, 06, 08 - Strong gravity
00, 08, 00, 07, 07, 01 - Strong inverted gravity
01, 01, 01, 02, 05, 00 - Weak gravity
00, 08, 02, 07, 06, 06 - Weakest gravity