Sure! Here's an example of a simple space game implemented as a single HTML file using JavaScript and enclosed in script tags:
This game features a player controlled by the arrow keys on a smartphone. The player is represented by a rectangle and can move horizontally within the canvas. The game loop continuously redraws the canvas and updates the player's position based on the arrow key inputs.
You can add further features to the game, such as enemies, bullets, or scoring systems, based on your specific requirements.