Sure, I can help you create a simple shooting game using JavaScript that can be played on a smartphone. Here's an example implementation:
This is a basic shooting game where the player's objective is to shoot the enemy by tapping on the screen. The player can control their character (represented as a blue rectangle) and an enemy (represented as a red rectangle) falls from the top of the canvas. If the player shoots the enemy, it will reset to the top with a random X position. If the enemy reaches the bottom of the canvas without being shot, the game ends.
Please note that this is just a simple example to demonstrate the concept of a shooting game using JavaScript. You can enhance it further by adding more features and graphics as per your requirements.