I have some concerns about your use of copyright material.
I'm pretty sure this is breaking copyright laws.
We did the research, SEGA has a very leniant stance on fan games, and this is within their boundaries. They generally encourage fan games and even brought independent devs on staff to develop their games (Sonic Mania started as a fan game).
Sega Is Still Cool With Sonic Fan Games, Provided "No Profit Is Involved" | Nintendo LifeSega Is Mostly Okay With Sonic Fan Games - IGNSonic the Hedgehog Fan Games Are Mostly Allowed By Sega (screenrant.com)Sega provides greenlight for fan-made Sonic titles "so long as no profit is involved" (nme.com)
