Mad space genuinely has to be one of the worst levels I've ever played in a video game.
Other than that game is great although the dark story is Better than hero story.
The stages with Sonic and shadow are fun
The stages with Tails and Eggman are fine I guess
The stages are Knuckles and Rouge are absolutely horrible Rouge’s are worse as they're more open than Knuckles and one has a 5 minute time limit.
But overall a pretty great game I would recommend if you haven't played