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Short rounds you can play again and again — that's what arcade games are. One plain objective, a handful of buttons, and a run that wraps up quickly enough for a lunch break. Timing and a little daring matter more here than long-term planning. You leap at the right instant, you tap to burst a bubble, you guide a car up a hill without rolling it over. A loss just means you can restart straight away, and that's what makes these so simple to start on a phone.

Dinosaur Game is the place to begin if you're after the classic running-and-jumping. For goofy physics and cautious hill driving, Eggy Car is a solid choice. Geometry Dash: Infinity fits anyone who enjoys a rhythm behind their jumps and doesn't mind replaying a level until it finally works. Pick one, find out how far you can go, then move on to another.