>>531368310
>Is this the artist's AU or something?
Yep.
They had some mock-ups for gameplay ideas riffing on Mega Man for it too. Sadly never went anywhere.
Mostly notable for the premise (an FNF mod they made) which featured Sonic stuck in Labyrinth Zone for an eternity.
https://youtu.be/UOlDIu9LNFk?si=XP_TYo2WafMnEHfk