Sure! Here's a simple football game implemented as a single HTML file using JavaScript:
To play the game, save the above code in an HTML file (e.g., `football_game.html`) and open it in a web browser, preferably on a smartphone. The game features a blue player at the bottom controlled by arrow keys or touch gestures. The objective is to prevent the black ball from touching the ground. If the ball touches the ground, the game ends and a "Game Over!" alert pops up before resetting the game.
Please note that this is a simple implementation for demonstration purposes and does not have advanced features like FIFA games. Feel free to modify and enhance the code as per your requirements.