Sonic X Shadow Generations gives you a return ... This opens the door to a yellow spring which leads to a faster route. Once you get outside again, follow the path until you land on a green ...

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 ...