-> Maybe an option to Turn off the Super Sonic Music.
Most Fan games give that an option and it's a god send after 6 hours of hearing the same music and not being able to listen to the actual stage music
Sonic Megamix for example allows you to toggle it in the options menu, and it's cool to hear it every now and then, but the stage music is much better as it's not a 5-10 sec loop that's looping 5+ times per level
Personally, I loved the Super Sonic music from Sonic 2, but the rest of them do get tiresome pretty quickly.
Super theme is shitty and disturbing. The people behind the Sonic 3 Complete project used a fast act music for Super Sonic, and that's much, much better.