Sure! Here's an example of a simple fighting game adventure implemented as a single HTML file using JavaScript and enclosed in script tags:
When you open this HTML file in a web browser, you'll see a canvas where you can control a blue player character using the arrow keys. The goal is to avoid colliding with the red enemy character. If you collide with the enemy, an alert will be displayed saying "Game Over!"
Note that this is a very basic example of a fighting game adventure, but you can expand upon it by adding more features, levels, and mechanics.