Sure, here's an example of a simple game implemented as a single HTML file using JavaScript and enclosed in script tags:
This simple game represents a robot spider that can move on a game board using the arrow pictograms. Each move updates the position and visually moves the robot spider accordingly on the screen.
Please note that this is just a basic example of a game using JavaScript and enclosed in script tags within a single HTML file. You can modify and expand it as per your specific game requirements.