5 stars: This is serprisingly one of the few modern Sonic games that's actually not bad. But it's not just not bad... it's actually really good. It's simple, fun, and does the franchise justice. It also removes the platforming element making it an almost 100% running game which is good for Sonic. Some tracks look like they were based off of Sonic Adventure 2. Aside from a lack of content, the game is quite good. Would recommend it.
4 stars: Well the game itself is enjoyable, may I even say somewhat addictive I do think that the animation itself could use some work, specifically on the running characters models. Especially when it does a close up, just to give them some more animation, make it a little more fluid. Other than that, I enjoy it. I would love to see more work on it, truly and a more involved experience, like caring for the animals even.
4 stars: This game is pretty great, good graphics, good controls. It has a decent character selection and an ok selection of tracks to run on. Though the game does take a long time to progress in and can be laggy at times, it can be completed without spending a cent on and is usually not laggy. Good game, I'd give it a try if your a sonic fan or just looking for some fun.
3 stars: Fun game to play on the go when there's no internet access, my nephew likes it, the controls are good, a bit challenging for a young child though, good graphics, ok character selection, my only problem is that the prices are a bit much, but no...