Human PrecisionHow far can you go before you lose control?
Stay sharp as the pace builds
Steer the ball through every opening as the walls arrive faster and the gaps tighten. The farther you make it, the higher you can climb.
Set the score
Give everyone else a distance to beat.
Your distance is your score. The field keeps accelerating until one mistake ends the run. Beat your best, submit it, and see how high you can climb on the global leaderboard.
Desktop mouse recommended. Touch input is supported but not directly comparable.Run ends if the tab loses focus.
Global ranks
The longest runs lead the board.
Completed runs are ranked by distance. Enter your name and country after the run to place your score on the global board.
| Rank | Player | Country | Distance |
|---|---|---|---|
| Loading... | |||
How it works
Simple enough to understand in one glance.
- 01Move the cursor onto the start point and hold it there through the 3-second countdown.
- 02When the run starts, your cursor becomes the ball. Read each wall early and line up with the opening.
- 03Walls arrive faster, gaps narrow, and the next opening can jump across the field.
- 04Clip a wall, leave the field, or lose window focus and the run is over.
Field notes
What the game can and cannot tell you.
Short writing on reaction time, devices, attention, practice effects, sleep, caffeine, and the limits of browser measurement.
Precision under pressure
What this game actually measures, and why it is not a clinical test.
Mouse and touchscreen scores are not equivalent
Input hardware is part of the measurement.
What repeated play improves
Practice can make you better at a task without proving broad cognitive transfer.