Sure! Here's an example of a simple shooting game implemented as a single HTML file using JavaScript and enclosed in script tags. This game assumes smartphone operation and uses pictograms for visualization:
To play the game, you need to open this HTML file in a web browser that supports JavaScript and touch events. When the game starts, you control a player represented by a circle. To shoot at the targets (rectangles), you tap on the canvas above the player's position. If a projectile hits a target, your score increases. If a target reaches the same height as the player, the game is over.
Please note that this is a minimal implementation of a shooting game, and it can be expanded and enhanced further based on your requirements and preferences.