TL;DR: Its a decent Sonic game, but the co-op experience is horrible and the asking price of $60 is crazy. Please excuse my low playtime - I played through HALF of the entire game LOL. I also played more on the Switch.

Terrible music. Half the tracks have decent instrumentation, but poor melodies so are quickly forgettable. The other half sound like they're on the Sonic 4 soundfont, particularly the boss themes.

The visuals are okay on this version (unlike on the Switch where they're awful), but still a bit cheap for the asking price and it doesn't have anti-aliasing. Some zones look nice like Bridge zone look awesome, while others like Sky Temple are an eyesore. Has that cheap mobile game feel at times.

The level design isn't horrible, but its very automated and Sonic 4-like. Some of the level gimmicks like the rails in the jungle zone or the walls in the bridge zone are great. Others suck, like the firefly thing in Jungle Act 2. That level is a chore. The physics are quite alright, but Sonic feels slow. Not a great sense of speed here. The emerald special stages are alright - something new at least. The checkpoint bonus stages are worse versions of Sonic 1's. The emerald powers you earn are very gimmicky and not fun to use. I just ignored them. The bosses are pretty awful.

The co-op experience is absolutely terrible and can be summed up by the phrase "Press A." Half the gimmicks do not work for more than 1 player and you constantly disappear off the screen. Its a pretty horrendous experience with just 2 people. I can't imagine playing this with 4. The barrage of "Press A." would be horrible.
Hell, Sonic Mania with the co-op mod is a better co-op experience than this.

As a singleplayer experience, it plays a little better.
Game will take you maybe 2-4 hours to beat.. if you're slow.

Forces you to sign in with Epic.
60 FPS cap.
Has denuovo.

Absolutely nowhere close to being worth the $60 price tag, especially when Sonic Mania was a fraction of that at release and is better in every single way.
Plenty of new Sonic fan games that are free and offer a better experience than this one.

This isn't some masterpiece you're missing out on so please wait for a price drop.

TL;DR: Its a decent Sonic game, but the co-op experience is horrible and the asking price of $60 is crazy. Please excuse my low playtime - I played through HALF of the entire game LOL. I also played more on the Switch. Terrible music. Half the tracks have decent instrumentation, but poor melodies so are quickly forgettable. The other half sound like they're on the Sonic 4 soundfont, particularly the boss themes. The visuals are okay on this version (unlike on the Switch where they're awful), but still a bit cheap for the asking price and it doesn't have anti-aliasing. Some zones look nice like Bridge zone look awesome, while others like Sky Temple are an eyesore. Has that cheap mobile game feel at times. The level design isn't horrible, but its very automated and Sonic 4-like. Some of the level gimmicks like the rails in the jungle zone or the walls in the bridge zone are great. Others suck, like the firefly thing in Jungle Act 2. That level is a chore. The physics are quite alright, but Sonic feels slow. Not a great sense of speed here. The emerald special stages are alright - something new at least. The checkpoint bonus stages are worse versions of Sonic 1's. The emerald powers you earn are very gimmicky and not fun to use. I just ignored them. The bosses are pretty awful. The co-op experience is absolutely terrible and can be summed up by the phrase "Press A." Half the gimmicks do not work for more than 1 player and you constantly disappear off the screen. Its a pretty horrendous experience with just 2 people. I can't imagine playing this with 4. The barrage of "Press A." would be horrible. Hell, Sonic Mania with the co-op mod is a better co-op experience than this. As a singleplayer experience, it plays a little better. Game will take you maybe 2-4 hours to beat.. if you're slow. Forces you to sign in with Epic. 60 FPS cap. Has denuovo. Absolutely nowhere close to being worth the $60 price tag, especially when Sonic Mania was a fraction of that at release and is better in every single way. Plenty of new Sonic fan games that are free and offer a better experience than this one. This isn't some masterpiece you're missing out on so please wait for a price drop.