Sure! Here's an example of a simple shooting game implemented as a single HTML file using JavaScript:
This is a basic shooting game where the player needs to tap/click on the game container to shoot a bullet at a target moving from top to bottom. The game container represents the playable area, the red dot at the bottom is the bullet, and the blue rectangle at the top is the target. When the bullet hits the target, an alert message is shown indicating a successful hit, and when the bullet misses, another alert message is shown. The game supports smartphone operation and uses basic pictograms to represent the game elements.