Sure! Here's an example of a simple Pong game implemented as a single HTML file with JavaScript and enclosed in script tags. The game assumes smartphone operation and uses pictograms as much as possible.
To play the game, simply copy the provided code into a new HTML file (e.g., `pong.html`) and open it in a web browser. The game canvas will be displayed, and you can move the paddle by moving your mouse/finger. The objective is to bounce the ball off the paddles and score points by preventing the opponent from catching the ball. The first player to score the winning number of points (defined by `winningScore` variable) wins the game. Clicking/tapping on the canvas resets the game if a winner is determined. Enjoy playing!