Sure! Here's an example of a simple shooting game implemented as a single HTML file using JavaScript. It can be played on a smartphone and includes pictograms for the game elements.
You can copy and save the above code to a file with an HTML extension (e.g., `shooting_game.html`). It creates a simple shooting game where you control a player to move left and right using arrow keys and shoot bullets with the spacebar. The objective is to hit the enemy with the bullets while avoiding collisions.