Sure! Here's a simple shooting game implemented as a single HTML file for smartphone operation using JavaScript. I'll be using pictograms to represent the game elements.
In this game, you control a player pictogram and shoot bullets by pressing the space bar. The objective is to shoot down the enemy pictograms before they hit the player. If an enemy reaches the player, the game ends with a "Game Over" message.
Note: You would need to provide your own image files (`emozi_all/player.png`, `emozi_chicken.png`, and `emozi_all/enemy.png`) to display the pictograms properly. You can replace the filenames in the code with the actual filenames of the image files you want to use.