Sure! Here's an example of a Snake game implemented in a single HTML file using JavaScript. The game uses pictograms and can be played on a smartphone:
To play the game:
1. Copy the code into a new HTML file.
2. Open the HTML file in a browser.
3. Use the arrow keys to control the snake.
4. The snake should move around and eat the red food, growing in size.
5. If the snake collides with its own body, it will restart the game.
Enjoy playing the Snake game on your smartphone!