The controls are easy to use and completely customizable; you can even tilt and rotate the screen, which is a great option. The superior level design strikes a great balance; there are times when you will be rushing downhill like you do in Sonic, and then there will be times when you take it slow and solve a puzzle. In the second half of the game, you gain the ability to transform yourself, turning from a spongy ball to a solid rock. The transformation is on-the-go and adds a completely different dimension to the gameplay. The second part of the game is less about bouncing and more about breaking into objects, hence the transformation into a rock.  The game looks really good for a mobile game and can easily pass of as a Nintendo DS title. The levels are designed very well and the presentation is quirky; overall, this is a great game, apt for mobile gaming.  Source: www.techtree.com
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