Almost all music of Sonic & Knuckles. There are no title screen music, invisible music and Knuckles theme. (and no multiplayer zones) You're really stupid if you don't already know what to do (just click them). Well and there aren't special stage too.
Music by Sega, and found on scratch by FreeSoundsProject. Use if you want. Sonic the hedgehog 3 music here: https://scratch.mit.edu/projects/467409864/ (Sonic & Knukcles are second on my favourite games)
