Sure! Here's an example of a simple implementation of the Flappy Bird game in a single HTML file using JavaScript:
To play the game, you can open the HTML file in a web browser, and the game will start automatically. The player controls the bird by pressing the Spacebar to make it jump and try to navigate through the gaps between the obstacles. The goal is to achieve the highest score possible by passing through as many gaps as possible without hitting the obstacles or the ground.