General activity only, not medical measurement or treatment. Use a stable position, a clear area and only comfortable target heights. Stop for pain, dizziness, breathlessness or unusual fatigue.
How to play
- Choose both sides, left only or right only; then select comfortable target heights and sizes.
- Use touch or mouse, or enable optional local camera fingertip tracking.
- If using the camera, move only through a comfortable area during calibration.
- A cyan car belongs to the left signal and an amber car belongs to the right signal. Reach or tap the matching target before the car reaches the intersection.
- Begin with large targets and a slow pace. Smaller targets increase pointer precision, not medical difficulty.
Configuration and safety
Low, middle, high and mixed targets are portions of your calibrated comfortable range, not prescribed shoulder angles. The three target sizes and five speeds can be changed by the player or platform configuration.
Camera processing stays in the browser; raw video and landmarks are not stored. This is not a shoulder-function or reaction-time assessment. Use a stable position and clear surrounding space. Stop for pain, dizziness, breathlessness or unusual fatigue. Safety stop records zero score and reward.