Sure, I can help you create a simple shooting game using JavaScript. Here's an example implementation as a single HTML file:
This game involves a player controlled by arrow keys (or on a smartphone, the player can tap left or right on the game screen to move). The player shoots bullets by clicking/tapping on the game screen. The objective is to destroy the randomly spawned targets using the bullets. The game ends when all the targets are destroyed, and the score is displayed.