We have received some feedback that the free version of KaleidoBalls is failing to launch in some circumstances. From our initial look, it appears that KaleidoBalls-Free is not compatible with iOS earlier than version 4.2
In particular, we see an issue when running KaleidoBalls-Free on iOS 4.0 and are looking into whether we can come up with a solution. Please check back here for further updates.
In the meantime, the failing to launch issue may be resolved by upgrading your device to iOS 4.2, which is a free update available through iTunes.