As a language model AI developed by OpenAI, I can provide you with a simple example of a mobile game implemented as a single HTML file using JavaScript. In this example game, called "Dig Simulator," the player must dig for hidden treasures by tapping on the screen. Here's the code for the game:
To play the game, simply open the HTML file using a web browser on your smartphone. You will see a canvas that represents the game screen. Tap on the screen to dig for treasures. Each treasure is represented by a gold square on the canvas. The game loop will update the canvas 60 times per second to create smooth animations.
Note: This is a simple example and can be expanded upon to include more game mechanics, levels, scoring, and more.