This is AMAZING, the controls respond pretty well, the frame rate is really good and other cool things: 1.You can restart on the special stage 2.You can fly with Tails and airlift Sonic up into the air (You can do it by holding up and jumping twice). 3.The Special Stage is made easier with a larger field of view and... 4.It's harder to get crushed by those moving platforms in Chemical Plant. The only problem is that the game is littered with ads. But it's a great game for Classic Sonic Fans!