Normal Mode: The main mode of the game.

Daytime Mode: The same as the normal mode, except it’s daytime. You unlock this after beating the game.

Sanic Mode: In this mode, you go really fast, but you can stop. You unlock this after beating the game, along with unlocking Daytime Mode.

Super Sonic Mode: This mode gives you Super Sonic powers, and you are invincible from Sonic and you can beat the game easily, but it doesn’t unlock the other modes. You unlock this if you type “SUPERSONIC” on the code screen.

Gun Mode: This mode gives you a gun and you can kill Sonic, but after killing him, he can respawn. You unlock this after typing “GIMMEAGUN” on the code screen.