Simon Blitz takes a familiar idea and tunes it until it clicks. Here you get patterns that speed up every level, down to 160 ms per flash, wrapped in a clean, distraction-free board that works just as well on a phone as on a laptop.
Best level is saved locally, so the game quietly turns into a personal duel. The gap between your level 12 and your level 15 is usually one silly tap - which is precisely why one more round always feels justified.
It suits anyone with a queue to wait in or a kettle to watch: students between classes, commuters, parents stealing ten quiet minutes. There is no meta-progression to lose and nothing to catch up on - a week away costs you nothing but a little sharpness.