Pretty terrible. It has some pretty visuals, and the music is good, those are the only real positives.

There are very very short bursts of interesting setpieces in levels. But they are over after 10 seconds.

The general level design is bad. The controls are terrible both in 2 and 3D. The story is stupid like most Sonic games but it has no charm this time. Even with returning characters.

Making your own Avatar is neat but it isn't in service to anything. The game is already bloated with 2d and 3d sonic so the Avatar just makes things even more drawn out.

The 10 bucks I spent on this was way too much. There is certainty a worse Sonic game, but not by much. This is an easy skip.