Shame... All those sprites and tile backgrounds are just begging for a DMCA take down. Why not just put up the tools that disassemble those from the ROM instead?
Because of this, you’ll fine tonnes of Sega fan stuff. From multiple active Phantasy Star Online servers through to entire fan-made Sonic games.
In fact iirc Sonic Mania started life as a fan game and Sega asked them to produce a full game.
(Assuming you care about your work and sharing it. Sure "Sega is chill" so far but you are really pushing it here and giving them a great display of why they might want to reconsider)