Sure! Here's an example of a simple Pong game implemented in a single HTML file using JavaScript. The game is designed for smartphone operation and uses pictograms for visual elements. Copy the code below and save it in a new HTML file to play the game:
To play the game, open the HTML file in a web browser on your smartphone and use touch/mouse controls to move the player paddle. The computer-controlled paddle will try to follow the movement of the ball, and the game will continue until one of the paddles misses the ball.
Enjoy playing Pong on your smartphone!