This is, hands down, the objectively best way to play the original Sonic the Hedgehog. The changes this game makes are VITAL to enjoying the original Sega Genesis classic, and once you play this version, you won't be able to go back. To start, the first thing you may notice is that the game is zoomed in. This gives the game a bit of a challenge, preventing the game from being a cake walk like that "Super Mario Brother." Sonic's physics have also been tweaked, and now he controls better than ever! They made him heavier, and slower, giving the game a bit of realism. Much better than the original game. Sometimes, especially when there are a lot of sprites on screen, the game will slow down and give you time to assess the situation and prevent unfair deaths. "Gamers" would call this lag, but I would call it a blessing. The music has also been improved, now sounding like a midi file. And who doesn't love generic midi instruments? This game also adds aniversary mode, which adds a new way to play this classic. You're probably thinking, what does it add? You see, anniversary mode makes one major imrpovement that makes the game infinitely better. The spindash! If you're a loser who hates cool things, then you can just play classic mode which doesn't have the spindash. Yep, I know. Totally warrants its own game mode. Overall, I'd recommend this game to everybody and their grandma. Truly the best way to play this classic.