Sure! Here's a simple shooting game implemented using HTML, JavaScript, and the HTML5 canvas element:
To play the game on a smartphone, you can open the above code in any smartphone web browser (e.g., Chrome, Safari). The player can control the movement using left and right arrow keys, and shoot bullets by tapping the screen. The goal is to avoid colliding with the bullets. If a collision occurs, an alert with the message "Game Over!" is displayed.
Please note that this is a basic implementation of a shooting game and can be customized and enhanced further based on your requirements.