Endless runners are one of the most-used genres on the App Store lately -- from the original Canabalt to later hits such as Jetpack Joyride and one of my current favorites, God of Blades. There are plenty of them out there, and the best ones have some innovation or a new twist. Polara, one of the latest entries to the genre, has both. Not only does it feature a color-changing twist, but the way the game is structured (in a series of checkpointed, story-based missions) puts a fairly new spin on the way these games work.
