Sure, here's an example of a simple fighting game featuring mobile game characters, implemented as a single HTML file using JavaScript:
In this game, you have two mobile game characters represented by images. The images can be replaced with pictograms representing game characters. The game starts automatically after the page loads. Player 1 (`fighter1`) is computer-controlled and Player 2 (`fighter2`) is controlled by pressing the space bar on the keyboard. The characters attack each other, and if a character's health reaches 0 or below, they are defeated. The game resets after a character is defeated. The positions of the characters on the screen are updated in real-time.