Sonic's Adventure Update!

This is the biggest update ever. Here is the changelog

Added Green Hill Zone (Sonic Mania) To Freeplay

Added Tornado Defence Act 1 To Freeplay

Added Eggdragoon To Freeplay

Added Endless Possibilities (Boss Remix) To Freeplay

Added Campaign To Main Menu

Added Main Story To Campaign

Added Sonic's Adventure To Campaign

Added New Backgrounds For All Menus