Sure! Below is an example of a simple implementation of Flappy Bird game using JavaScript and HTML. Please note that due to the complexity of Flappy Bird, the code provided here is a simplified version. You can customize and modify it to add more features and improve the gameplay experience.
To use this code, save it as a `.html` file, and open it in a web browser that supports JavaScript. The game will start automatically, and you can click on the screen (or tap, assuming smartphone operation) to make the bird jump. The objective is to pass through the gaps between the pipes and avoid collision. Your score will increase by one each time you successfully pass a pipe, and the game will end if the bird collides with any of the pipes.
This is a basic implementation of Flappy Bird using JavaScript, HTML, and CSS. You can further enhance it by adding sound effects, better graphics, and additional gameplay features as per your requirement.