Sure! Here's an example of a simple shooting game implemented as a single HTML file using JavaScript, enclosed in script tags. The game is designed for smartphone operation and uses pictograms for visuals.
This is a basic implementation that allows the player to control a blue circle (representing a player) using the left and right arrow keys. The player can move within the game area (represented by a gray box) without going beyond its boundaries. Feel free to expand on this code to add shooting functionality and more game features.