Race the Sun ($10)
Race the Sun is something of an endless runner, only it's super-fast, seriously tough, and also wickedly fun to boot. You'll guide a solar-powered craft into a simple, low-polygon wasteland, and attempt to survive by avoiding collisions, collecting power-ups, and staying in the sunlight. Lasting for more than a couple minutes feels like a mean feat, and as new abilities and modes unlock, Race the Sun becomes fiercely satisfying. And with a brand-new environment to zip through each and every day, you'll have plenty of reason to keep attempting this futile sprint.