Sure, here's a simple game implemented as a single HTML file using JavaScript. It can be played on a smartphone and uses pictograms. Copy and save the following code into an HTML file (e.g., "game.html") and open it in a web browser:
🚗
To play the game, open the HTML file in a web browser on your smartphone. You will see a pictogram of a car, represented by an emoji
🚗. By using the arrow keys on your smartphone's keyboard, you can move the car left and right across the screen.
Note that this implementation is a basic example of a game and can be further enhanced with additional game mechanics, levels, and graphics. Feel free to modify and extend it as desired!