A smiley face is drawn as a yellow SVG circle with black facial features, but its eyes are replaced by two small circles that follow the viewer's cursor. The React application tracks mouse movement using the `onMouseMove` event handler and updates the eye positions via the `useState` and `useCallback` hooks. The visualization is rendered with React DOM into an SVG container, using the React library version 16.9.0. The interactive behavior directly responds to pointer coordinates, creating a playful, face-tracking effect.