Sure! Here's an example of a simple implementation for Flappy Bird 2 as a single HTML file using JavaScript:
To play the game, you will need to open the HTML file in a web browser, and then you can control the flappy bird by pressing the spacebar key to make it flap. The objective is to avoid colliding with the green obstacles and try to get the highest score possible. Once the game is over, a "Game Over" message will be displayed on the screen.