The game is impressive, but I don't think recreating the original game with this much fidelity was a good idea. Even if it's completely remade from scratch, it's so close to the original game that I'd understand if SEGA wanted to take this game down.
I think that game can be banned, because this is a remake of Sonic Generations in Roblox. Well Roblox is free and that means that you play Generations for free. Sega won't like you to play Sonic Generations for free...
it cant dw sega wont take it down because some of the levels are original and if they intended to do this they eould have taken down all the emulators by now