Sure! Here's an example of a simple shooting game implemented as a single HTML file using JavaScript:
This code sets up a simple shooting game where the player can move their character (represented by a blue rectangle) using arrow keys. The player shoots bullets (represented by red rectangles) that move vertically upward. When the bullet reaches the top of the screen, it resets to the player's position.
Feel free to modify and improve this code further to suit your needs and enhance the game functionality.