Sure, I can help you create a simple shooting game using JavaScript in a single HTML file. Here's an example implementation:
This game sets up a canvas element with a player controlled by the left and right arrow keys. Pressing the spacebar shoots bullets from the player's position upwards, and the bullets disappear when they reach the top of the screen. The game continuously updates and redraws the player and bullets on the canvas for smooth animation.
Feel free to customize the game further to add enemies, power-ups, or any other features you'd like. Keep in mind that this is a basic example, and you can expand upon it to make it a more comprehensive shooting game.