It's absolutely fantastic until Murky Mines Zone which is dogass.
The performance is consistently bad and the game is very buggy, but when it works, for a while, it's great.

Just checked it out, and damn, this game is a blast! Seriously, all of the stages are amazing—personally think they outshine the official classic Sonic games. It's kind of a bummer that not many people know about it. GO PLAY SONIC CLASSIC 2!!!

replayed it again and uhh, I guess recently bias came into a big play. Collision issues shit bosses the only thing good is the level design and the 1200 power music