Roll through each level in the quickest time possible. If you make a mistake, simply rewind time. This game is all about Speed, Dexterity and Skill. Gain speed with every curve, time it right to get a perfect flow. Finish a level fast enough you will unlock the Challenge mode version.
If you can't figure out how to beat a Nimball Rewind level, you've come to the right place. Here is the walkthrough guide for levels 1 - 30!