I made this simple game over the weekend to test out hand tracking gaming.
Claw Tower is a browser game where a slab hangs from a crane. You steer the crane with your bare hand through the webcam, pinch to hold, and let go to drop. The slab lands with real physics, the overhang gets sliced away, and the tower climbs until wind or a bad drop ends the run.
The hand tracking runs on MediaPipe. Your index finger position steers the crane in both axes, and the pinch between thumb and index is the only button: pinch holds the slab, opening your fingers drops it. There's hysteresis on the pinch threshold so it doesn't flicker, and if the camera loses your hand for a few seconds the mouse takes over. No webcam at all? Mouse and touch work as regular fallbacks.
The stacking rules are simple. Land a slab clean and it fuses where it touched down. Whatever hangs over the edge gets sliced off and tumbles away, so the tower gets narrower with every sloppy drop. Perfect drops chime up a scale and grow the slab back. Wind picks up as you climb and a balance meter drains on off center landings. Drain it fully and the top of the tower shears off.
The stack is Vite, React, TypeScript, Three.js for rendering, Rapier for physics, and MediaPipe for the hand tracking.