its an improvement over the first episode, that's for sure. But it's still not worthy of being called sonic 4 IMO. Adds tails back in because tails was in sonic 2 on the mega drive, get it? Also metal sonic is here which is cool and his theme song kinda slaps in this game, which is not something people expect out of the sonic 4 OSTs. If for some bizarre reason you are forced to play a sonic 4 game pick this one, but still you should probably play literally any other 2D sonic before either of these.