Sure! Here's an example of a simple game implemented as a single HTML file, enclosed in script tags and written in JavaScript:
This game creates a canvas element and animates a bouncing particle on the screen. You can view and play the game by saving the code as a `.html` file and opening it in a web browser on your smartphone. The particle is represented by a circle drawn using the `arc` method, and it bounces off the edges of the canvas.
Feel free to modify and enhance the game to add more interactive elements, levels, or rules as per your requirements.