This is the Sonic game of all time. A game with Eggman winning and character customization sounds like a shoo-in for a tremendous Sonic game, but it's just disappointingly mid. The level design is the most watered-down version of the boost formula I have ever seen. There is very little variety in alternate paths and stronger enemies because you can instantly use your overpowered weapons and boost to destroy them.

As for the story, you bring back fan enemies like Metal Sonic and Chaos, but they barely have any character interaction or impact on the plot. How come we hear Tails has gone mad after the news of Sonic's disappearance, yet he seems fine when Classic Sonic shows- oh fucking right, we're doing this shit again?!?!? Granted, we saw this hinted at with the Reality Stones in the true ending of Sonic Mania, but his gameplay ends up sucking here, too, because it's primarily long hallways or slow-moving levels.

And the music... it's okay. Other than all the classic sounds, the level music is OK if you like electronic sounds. Nothing like the older games, but it could be worse (see Sonic Chronicles: The Dark Brotherhood).

I got this game for free with PS+, and I recommend you get this at little to no money or just fucking avoid it and play Sonic Frontiers instead.