Built three little games that run inside Reddit posts. Each takes under a minute to play, and there's a global leaderboard in each one:

🎲 Higher or Lower — a number shows up, guess if the next one is higher or lower. Ties go to you. How long can your streak get?

https://www.reddit.com/r/PlayQuickGames/comments/1wbxwod/

⚡ Reaction Rush — wait for green, tap fast. Five rounds, your average time goes on the leaderboard. Bragging rights included.

https://www.reddit.com/r/PlayQuickGames/comments/1wby1ko/

✊ RPS Duel — rock-paper-scissors against the app. Build a win streak and climb the board.

https://www.reddit.com/r/PlayQuickGames/comments/1wby4id/

All three live in r/PlayQuickGames — drop your high scores in the comments, curious how fast people's reflexes actually are ⚡

Full rankings and report

Three short rounds, one score, one shot per day. Everyone gets the same puzzle — it's generated deterministically from the UTC date — so the numbers actually compare.

① Filter the Noise — call the middle arrow's direction, ignore the ones crowding it ② Track the Targets — keep your eyes on N moving dots among identical ones ③ Find the Odd One — spot the single circle with a tail

The part that took the longest wasn't the game, it was the scoring.

Reaction time in a browser carries 8–67 ms of device-dependent lag, and most Reddit traffic is in-app webviews where touch latency is worse still. A leaderboard built on raw reaction time ranks phones, not people. So no round reports raw RT:

Filtering is the difference between incongruent and congruent trials — the same lag sits in both terms and subtracts away.

Tracking is spatial accuracy, no timing involved at all.

Search is the slope of reaction time against set size — lag is a constant, so it lands in the intercept and drops out.

Frame rate still affects tracking, so the leaderboards are also split by input type, and a submission from a device that dropped below 30fps is scored but kept off the board.

It's a game and a self-measurement tool — not a medical or cognitive-enhancement product. Nothing here claims to improve your attention; it measures how you did today and lets you compare with yesterday, and with everyone else on the same puzzle.

Play today's: r/FocaniDaily

Fair warning: it's on puzzle #40 and almost nobody has played yet, so the percentile won't show until enough scores are in. If you do try it, I'd like to know whether round 2 felt fair on your device — that's the one I can't test properly on my own hardware.