Simon Deep

Simon Deep is a browser game built for short, satisfying sessions - it loads instantly, plays with one thumb, and runs on any mid-range phone. The setup is simple: patterns that speed up every level, down to 340 ms per flash. Nothing to install, no account, no waiting.

Getting into Simon Deep

Each level adds one step to the light pattern, and the playback gets faster as the level climbs. You watch, you repeat, and one wrong tap ends the run. The patterns that speed up every level, down to 340 ms per flash, so late rounds feel less like a memory game and more like a reflex test.

Why Simon Deep sticks

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.

How to play

1. Press play and watch the pads flash in order.
2. Tap the same sequence back to clear the level.
3. Each level adds one more step to the pattern.
4. One wrong tap ends the run - your best level is saved locally.

Where it sits

Repeat the light pattern. It speeds up every level.

A note on the sticker

Read Simon Deep as a Teka Shelf game first and a Teka Shelf game second. The shape explains how the session will end; the group explains what it will ask of you before that.

The board is easy to read and the difficulty is Medium, so the interesting decision is not whether you can play it but when. Its rating across our own notes is 4.5 out of five.

Keep it if you play in short bursts. It rewards a second attempt far more than a first, and the second attempt costs nothing but the tap.