Sure! Here's an example of a simple billiards game implemented using JavaScript within a single HTML file:
In this game, the user can control the movement of the cue ball by touching and dragging on the smartphone screen. The cue ball will move in the direction and speed determined by the user's touch movements. The canvas element is used to draw the billiards table and the cue ball on it. The game automatically updates the positions of the objects on the canvas using the `requestAnimationFrame` function.