How to play
Choose either hand, left or right; select low, middle, high or mixed shelf positions; then choose same-side, cross-midline or mixed transfers. Touch or mouse is the default. Optional camera mode privately tracks an index fingertip after a six-second comfortable-range calibration.
Touch and drag a treasure to the glowing chest, or tap the treasure and then the chest. In camera mode, hold the pointer briefly over each target. The five cue paces change the real time available for each transfer. A cross-midline task places the chest on the opposite side of the screen.
Safety boundary
Use a stable seated or supported standing position. Select only shelf heights already comfortable for you and do not stretch to your limit. Stop immediately for pain, dizziness, breathlessness or unusual fatigue; the safety-stop result earns no score or reward. Camera processing remains in the browser and stores neither video nor landmarks. This is general activity, not medical measurement, treatment, rehabilitation prescription or outcome assessment.