Sure! Here's an example of a simple Flappy Bird game implemented as a single HTML file using JavaScript:
This implementation creates a simple Flappy Bird game with a canvas element to display the game graphics. The bird's position is updated based on gravity and user input (clicking). The game loop updates the game logic and renders the graphics. It also handles collision detection and keeps track of the score.
Note: This is a basic implementation, and there are many ways to enhance the game further.