Hand Ink

Develop a gesture-driven ink and sand painting creation application named Hand Ink. The core functionality should support camera access, allowing users to draw ink strokes, sand particles and water-texture strokes on the canvas via hand movements. Build in smooth switching capabilities between camera modes and sound effects, with real-time visual feedback that clearly displays the current ink density and dynamic state of the content being drawn. Add a canvas clear function, support export of static finished works, and enable recording of 15-second WebM format video clips of the creation process. Integrate local MediaPipe hand tracking resources to ensure stable and accurate hand movement recognition, and preload experimental jazz sound effects that match the interactive creation experience. Optimize the entire application to run smoothly on mainstream web browsers, positioning it as a tool suitable for users to carry out interactive visual creation conveniently. Make sure all interactive links run stably, the tracking response has no obvious delay, the exported content is clear and complete, and the overall operation logic fully meets the needs of casual creative interaction for ordinary users without complicated operation thresholds.