Sure! Here's a simple shooting game implemented in a single HTML file using JavaScript. It uses pictograms and is intended for smartphone operation:
This simple shooting game allows you to control a player represented by a square using left and right arrow keys. You can shoot bullets by pressing the spacebar. The objective is to shoot the green enemy squares and avoid colliding with them. Your score increases each time you successfully hit an enemy. The game ends when a collision occurs with an enemy square.