Sure! Here's a simple example of a game called "Zombie Shooter" implemented as a single HTML file, using JavaScript and pictograms for smartphone operation:
To play the game, open the HTML file in a web browser on your smartphone. Use the arrow keys to move the player (represented by a green square). Avoid colliding with the zombies (represented by red squares) and try to survive as long as possible. Your score will increase each time a zombie goes off-screen. If you collide with a zombie, it's game over, and your final score will be displayed in an alert dialog. You can then restart the game by closing the dialog. Have fun playing Zombie Shooter!