Lastronaut, free for iOS by Darrin Henein and Stephan Leroux, is the best sort of casual endless runner/arcade game... fast, chaotic, flashy, addictive, and, yes, completely free with no ads or in-app purchases whatsoever. The concept is simple... you're an astronaut racing down a road filled with all sorts of hazards and enemies, and you're given a random weapon. You run forward automatically, so tapping the left side of the screen makes you jump, while tapping the right side of the screen fires. It's up to you to last as long as possible to get the highest score you can... easier said than done since a single hit knocks you out in glorious slo-mo-o-vision, and then you have to start again. Different weapons descend in capsules with parachutes, and you'll face everything from evil robotic drones to a variety of other explosive dangers. Though it definitely gets repetitive, Lastronaut's fantastic style and aesthetic makes its simple, just-one-more-run gameplay a pleasure to play and behold, much like classic Canabalt. If you want something complex, this isn't it, but Lastronaut's twitchy, satisfyingly explosive gameplay is perfect for a few minutes of fast-paced, chaotic action whenever you need it.