Sure, I can help you create a simple mobile zombie shooter game using JavaScript. Below is an example of a single HTML file that implements the game:
To play the game, simply open the HTML file in a browser on your smartphone. The game will start, and you can control the player's position by moving your finger across the screen. As you move, try to touch or "shoot" the zombies represented by red circles. Each hit will increment your score, which will be displayed at the top left corner of the screen. The game will continue until you close the browser.
Please note that this is a simplified implementation to demonstrate the basic concept. You can customize and enhance the game further according to your preference and requirements.