Sure, here's an example of a simple implementation of the Flappy Bird game using HTML and JavaScript:
You can save this code in a file with the ".html" extension and open it in a web browser to play the Flappy Bird game on your smartphone or computer. The game consists of controlling the bird by tapping the screen or pressing any key on the keyboard to flap its wings and avoid colliding with the pipes. The goal is to get the highest score possible by passing through the gaps between the pipes.