Sure! Here's a simple shooting game implemented as a single HTML file using JavaScript. It is designed for smartphone operation and uses pictograms for a visual representation of the game. Enjoy!
To run this game, save the code above as a .html file (e.g., game.html) and open it in a web browser on your smartphone. The game consists of a player character controlled by arrow keys (or touch movement) shooting projectiles at enemies that are spawned from the top of the screen. The goal is to avoid colliding with enemies and earn points by shooting and eliminating them. The game ends when a collision occurs, and the final score is displayed. Enjoy the game!