Sure! Here's an example of a simple gun game implemented in a single HTML file using JavaScript and enclosed within script tags:
This code sets up a simple gun game where you can move the gun horizontally on touch and shoot bullets by touching the screen. The game loop continuously updates the bullet's position and redraws the gun and bullet on the canvas. The bullet disappears when it reaches the top of the canvas.
You can customize and enhance this game further according to your requirements by adding more features, levels, and styling.