Sure! Here's an example of a simple Snake Game implemented as a single HTML file using JavaScript:
To play the game, you can open the above code in any modern web browser on your smartphone. The game board will appear as a 400x400 pixel canvas, and you can control the snake's movement using the arrow keys. The objective is to eat the red fruits to increase your score without colliding with the walls or the snake's body. If the snake collides, the game will display your final score and reload for a new game.
Please note that this is a basic implementation of a Snake Game. You can further enhance the game with additional features, levels, and graphics based on your preferences and requirements.