This interactive tree fractal responds to mouse movement. The branching angle and branch length ratio change based on the cursor's horizontal and vertical position, dynamically altering the tree's shape in real time. The visualization uses the Canvas API with `drawTree` recursion, `beginPath`, `moveTo`, `lineTo`, and `stroke` to render branches, incorporating high-resolution display scaling via `window.devicePixelRatio`. The code originates from HTML5 Examples and is adapted for high pixel density screens.