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Don't Shake - Hand Stability & Physics Tremor Test

Test your hand coordination and micro-tremor control! Try to keep the metallic marble balanced in the center of the tilting plate against simulated hand tremors.

Don't Shake - Balance Test

An interactive hand coordination test! Try to keep the metallic marble balanced in the center green zone of the tilting plate against simulated muscular tremors.

Desktop Mode

Move your mouse to tilt the plate and balance the marble.

Mobile Mode

Tilt your phone physically to control gravity and balance.

What is the Don't Shake Physics Balance Challenge?

The Don't Shake game is an interactive physics-driven stability simulator designed to analyze your micro-motor control, reaction speed, and muscular tremor amplitude. Unlike simple static click tests, this utility challenges you to keep a heavy metallic marble perfectly balanced in the center green zone of a circular plate.

The plate is subjected to continuous simulated hand tremors (random micro-earthquakes and wind forces). You must counteract this simulated physical drift. On desktop computers, moving your mouse cursor relative to the center of the radar grid tilts the plate to roll the marble. On mobile and tablet devices, physically tilting your screen uses the built-in gyroscope sensors to roll the marble under real gravity, creating a highly realistic balancing marble game.

How to Play the Balancing Tremor Test

  • 1 Click the Start Calibration button to launch the circular stabilization plate.
  • 2 Hover your cursor (on desktop) or place your finger (on mobile) directly inside the glowing green center dot. This calibrates your starting baseline tilt.
  • 3 Hold perfectly still for 3 seconds to complete calibration. Once complete, simulated tremors will begin pushing the marble away from the center.
  • 4 Actively tilt the plate by moving your mouse slightly (or physically rotating your phone) to roll the metallic marble back into the green safe core.
  • 5 Survive the full 5-second window without letting the marble roll off the edge of the plate. If it falls off, the test ends in an instant out-of-balance event!

When to Use the Gyroscope Balance Test

This game is highly versatile, providing valuable motor feedback for various users:

  • FPS Aim Calibrations: Train your micro-aim muscles to perform continuous, subtle adjustments under tension rather than freezing up.
  • Caffeine and Stimulant Tracking: Quantify the direct impact of your morning espresso on your mechanical hand tremors.
  • Neuromuscular Coordination Check: Evaluate your day-to-day muscle fatigue, stress, and nervous system recovery.

Frequently Asked Questions

How does the physics-based Don't Shake game measure stability?

Unlike simple touch-and-wait tests, this game uses a real-time physics engine. You must balance a metallic marble inside the center of a circular plate. The game applies constant, random micro-tremors (simulating physiological hand shakes) pushing the marble away from the center. You must tilt the plate (by physically tilting your mobile device or moving your mouse cursor on desktop) to counteract these forces. Your final stability score is calculated from how close you kept the marble to the center and your overall survival time.

How do I control the tilting plate on desktop versus mobile?

On mobile and tablet devices, the game accesses your physical gyroscope and accelerometer sensors; simply tilt your phone in any direction to roll the marble. On desktop computers, moving your mouse cursor relative to the center of the radar grid tilts the plate (e.g., shifting the cursor right tilts the plate right). Both methods are highly sensitive, measuring micro-muscle adjustments with sub-pixel precision.

What happens if the marble rolls off the edge of the plate?

If the marble drifts beyond the 120-pixel radius of the plate, it falls off the edge, causing an instant out-of-balance event! The test will end early. Your final score will be penalized based on your survival ratio (e.g., surviving only 2.5 seconds out of 5 will result in a 50% penalty), making survival the ultimate challenge.

How can I score 95%+ and get the 'Surgeon Hands' rank?

Achieving a 'Surgeon Hands' or 'Sniper Stability' rank requires a score of 90% or above. To achieve this, you must keep the marble perfectly balanced within the tiny green core zone in the center of the plate for the entire 5-second duration. This requires rapid, extremely fine counter-balancing movements to cancel out the simulated wind and muscle tremors.

Is my motion data and accelerometer data private?

Yes, 100%. All physical tilt coordinates, mouse telemetry, and physics calculations are processed entirely client-side inside your browser's local sandbox. No data is ever transmitted, stored, or processed on external servers, protecting your absolute privacy.

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