Sure, here's an example of a simple shooter game implemented as a single HTML file using JavaScript and pictograms. The player controls a spaceship and shoots down incoming asteroids using the smartphone's touch functionality. Hope you enjoy it!
To play the game, you need to save the above code in a file named `shooter.html` and include an image of a spaceship named `emozi_all/play.png` in the same directory as the HTML file. When you open the `shooter.html` file on your smartphone, the game will start, and you can control the spaceship by swiping left or right on the screen. Shoot down the asteroids and avoid colliding with them to increase your score. The game will end when the ship collides with an asteroid, and a game over message with your final score will be shown.