Sure! Here's an example of a simple billiards game implemented as a single HTML file, using JavaScript and enclosed in script tags. The game can be played on a smartphone and uses pictograms to represent the balls.
In this example, there are three balls represented by different colored pictograms (red, green, and blue). The `play()` function is responsible for updating the game logic and redrawing the balls' positions on the canvas. The game loop is achieved using `requestAnimationFrame` to create a smooth animation.
Note: This is a basic template of a billiards game, and additional game logic such as ball movement, collision detection, and user input handling would need to be implemented to create a fully functional game.