Extra Sound Test Music

Normally the sound test has 39 songs on it. If you can beat (not just make it to) The Moon Zone, then the Sound Test will Have songs 40 (The Moon Zone), 41 (Sonic has cleared EXTRA), and 42 (Super Sonic Ending).

Play with Sonic & Tails in Story Mode

Go to game start on the main menu, and select Sonic (don't press A, just make sure he is on your screen.) When you do this, do the following:

Down, Right, Up, Right, L, Right, R, Right, A.

You should hear a chime like you just collected a ring letting you know the code was right. Select a course (if you have that option) and have fun.

Oh, by the way, the computer Tails isn't very smart, but it can be helpful. (He doesn't Die.)

Past the Screen Boundary - Neo Green Hill Zone Act 1

Run up to the first yellow spring in the level (Just as the ground turns to pavement and grass) and jump to the right side of it. Push yourself against it, face right, and do a spin dash. Release to send Sonic/Tails/Knuckles spinning forward, while holding Right on the control pad, and hold it. You'll go through the two loops, but as you go downhill, your character will fly far right and off the screen. Keep holding Right untill the camera catches up with your character.