Ms. Pacman

You can play Ms. Pacman online for free right here; the whole game runs in your browser tab. It's aged the way good arcade design does: the rules fit in a sentence and the mastery doesn't fit in a year.

Everything runs on keyboard and mouse; give it one round and the controls disappear into muscle memory. Phone, tablet or desktop, it runs the same, so you can pick up where boredom finds you. Hit the fullscreen button and the browser gets out of the way entirely. Scores here are personal: the only leaderboard that matters is your last attempt.