Choose the Direction

Use the blue arrow in the centre. The grey arrows are distractions. Under Same, choose the blue arrow’s direction; under Opposite, choose its opposite. Up pairs with down, and left pairs with right. The rule is always written out, with a pale red badge also distinguishing Opposite.

Same Direction always follows the arrow. Opposite Direction always reverses it. Mixed Rules has four Same and four Opposite signals per round. All six rounds have eight signals each. Later rounds add more distracting arrows and conflicting signals; Mixed Rules also changes the rule more often.

Pressing before a signal counts as a false start at 0 ms and earns zero points. A response under 120 ms after the signal is also a false start. Only the first input for each signal counts. Holding a key or repeatedly pressing during feedback cannot add more responses.

No. Each signal allows up to three seconds. At three seconds it becomes a timeout and the game moves on. A wrong response, false start or timeout earns zero points for that signal. You can still finish all six rounds.

There is no added time penalty. A wrong response earns zero points for that signal. Total response time includes the actual time taken to press, including wrong responses, and three seconds for each timeout. No extra seconds are added for a mistake.

Accuracy is the share of the 48 signals answered correctly. Median reaction time uses correct responses only, excluding wrong responses, false starts and timeouts. It shows — if there are no correct responses. Total response time sums actual response times and three seconds per timeout, excluding waiting before signals, feedback and breaks between rounds.

Leaving or reloading during an active round replaces only that round with fresh signals at the same difficulty and resets its responses. Completed and later rounds stay unchanged. Select Start round to resume. This keeps previously seen signals and time spent away from affecting your reaction record.

Restart this round replaces only the current round with eight fresh signals at the same difficulty after confirmation. Completed and later rounds stay unchanged. Opening the confirmation dialog during active play interrupts timing, so even cancelling prepares fresh signals for this round. Replay the same signals on the result screen replays all six completed rounds in their original mode.

Each mode has 100 sequences per difficulty stage, for 1,800 round sequences in total. Every round has two correct answers in each direction. New games avoid recently played sequences, and there is no daily limit.

On a computer, use the arrow keys to choose up, right, down or left. They are captured only during active play, leaving mode selection and dialogs available to normal keyboard navigation. On a phone, use the four on-screen direction buttons.

Your result records each round’s actual signals and rules, your chosen directions, outcomes and response times. An input made before a signal appears is marked as an early input during waiting, without showing an unseen arrow. Choosing a mode for the next game does not alter the completed result or shared image. A shared link opens the same signals in their original mode.

Progress and records are saved only in this browser and do not sync between devices. Clearing browser data may remove them. If browser storage is unavailable, you can still keep playing on the current page.

Correct responses score 60 + 40 × min(1, max(0, (1,800 − response time in ms) ÷ 1,600)). Under 120 ms is a false start and earns zero. Correct responses from 120–200 ms earn 100, and those from 1,800–2,999 ms earn 60. Individual signal points are not rounded; only the average of the eight signals is rounded.

Your title uses the total score from all six rounds. All three modes share the same title bands, while personal bests are saved separately for each mode. Your first completion is celebrated separately from an improved best. A tie does not count as a new best.

Reaction time can also vary with your device and input method.