There is a hidden special stage in sonic cd that is only accessible via the sound test menu by setting the numbers all to o7. When you put the cd into a CD player you can play the games soundtrack. Sonic cd was going to be a cd enhanced version of sonic 2. If you wait for 3 minutes and don’t press anything Sonic will fall off of the screen saying “I’m outta here!” and you will get a game over. That’s all for today.