The graphics were great, but that was really it. This just didn't seem to have much of a purpose. It was basically just five minutes of the exact same background with the exact same enemies. Look, I love Sonic the Hedgehog, but this just came off as too bland. You could probably mix it up by having different enemies who have different fighting styles. I DO have to give you props on having really good details.
You really seemed to want to do these characters justice. All the designs were just like they were in the games. For the most part, you just have to keep on pressing the space button. You do have to work with timing sometimes, but it doesn't amount to that much. Eggman is hard to beat.