Pros: Pretty challenging, you can fight enemies and doctor robotnik as your character runs
Lots of choices to make
Lots of details
Lots of things to do
The best characters such as Shadow cost too much and even it feels like forever trying to buy another less expensive character after you find all the red rings as you begin the game, it's hard to gather some more.
It can become tiring using Sonic constantly and not having at least one single character to switch with
Little kids may have a frustrating time with this game but it's a pretty simple but challenging sonic game for kids, albeit a bit too hard to control like other apps are.