Tennis Rally Challenge
Endless one-button rally with a shrinking timing window.
Read the direction. Move before you think.
Your scores stay on this device. The best score for this game is
stored in your browser using localStorage. Nothing is sent to us, there
is no leaderboard and no account. Clearing your browsing data clears your scores.
Every action has a keyboard and a touch equivalent. The game can be played entirely from the keyboard, and the on-screen pad appears automatically on touch devices.
| Input | Action |
|---|---|
| Arrow keys or WASD | Commit to up, down, left or right |
| On-screen direction pad | Same four directions on touch devices |
| P or Escape | Pause and resume |
| R | Restart the run |
Cover the correct court position before the ball arrives. Three misses ends the run.
This is a four-choice reaction task dressed as a tennis drill, and it is the least forgiving thing on the site. The other games let you learn a rhythm. This one removes rhythm on purpose: the pre-launch pause is randomised between 0.35 and 0.9 seconds specifically so that anticipation does not work.
Reporting milliseconds rather than only a score was the point of building it. A score conflates speed, streak length and luck. An average response time over ten or twenty returns is a reasonably stable number that you can compare against your own result from last week and learn something from.
One caveat we would rather state than bury: this measures your reaction to this specific task on this specific device, and a meaningful part of the number is display latency and input lag rather than you. Compare your results to your own on the same setup, not to anyone else's.
Four-choice reaction tasks are typically slower than simple reaction tasks because the choice itself takes time. Rather than publishing a target figure that would mostly measure people's monitors, we would suggest treating your own first session as your baseline.
The travel window expired. No response within the window counts as a miss, and the game tells you how long the window was so you know what you were working against.
No. The first directional press each round is final. That is what makes it a choice reaction task rather than a correction exercise.
It changes the travel window, not the measurement. Your reaction times are recorded the same way on every difficulty, so the millisecond average is comparable across settings even though the score is not.
Practising a specific reaction task reliably improves performance on that task. Whether that improvement transfers to other tasks is genuinely contested in the research literature, and we are not going to claim it does.
Endless one-button rally with a shrinking timing window.
Planned precision challenge scored on distance from the target centre.