Good stuff, but needs to feel like a $3 game. – Sonic Runners Adventure Review

It's great fun and all, but the level-up curve is steep - I wish I could watch ads for rings, but this is a $3 game, I should be naturally acquiring them throughout the game instead of needing to grind for them. Good revival of the Runners gameplay though.
Review by Jared Burkhardt on Sonic Runners Adventure.