I honestly LOVE the game!!! I mean, compared to Mario games, this is a well developed games! The only thing I suggest is to add more characters, but make them collectible, without paying. Aka, Espio. Adding characters like omega, vector, ect, will give people an idea of the sonic franchise, making them want to have an interest!!! However, if you DO want in app purchases, add characters like metal sonic, were wolf sonic, Archie sonic, mechanic sonic, Super sonic, super shadow, super silver, super tails, super knuckles, ect. I know its a lot but if sets puts their mind to it, I KNOW we can make this game a top ten game of the year!!!!!!! Good luck!