Well, this took me way too long to complete!
Anyway's here's yet another Sonic stage from me. Mushroom Hill from Sonic 3 & Knuckles, in all three variants from the game! I even added some additional details, like falling leaves for autumn and falling snow for winter.
DL: http://www.mediafire.com/download/ivyh7icma0l4zd3/MushroomHill.rar
Enjoy!
Credits:
Cybaster, because his stage tool continues to be incredibly useful.
POTS, because I "borrowed" and re-coloured the falling leaves animation from his stage.
Ryoucchi, because I "borrowed" the falling snow animation from his stage.
Skylights, because he ripped the Mushroom Hill sprites.