Sure! Here's an example of a simple billiards game implemented as a single HTML file using JavaScript, enclosed in script tags:
This code sets up a simple billiards game where the player controls a ball (represented by a circle) with their smartphone by tilting the device. The ball moves around the screen and bounces off the walls. If the ball reaches the bottom of the canvas, the game is over and an alert is shown. The game is continuously animated using the `requestAnimationFrame` function.