Sure, here's an example of a simple Flappy Bird game implemented as a single HTML file using JavaScript and pictograms:
To play the game, simply copy the code into a new HTML file (e.g., "flappy_bird.html") and open it in a web browser. You will be able to control the bird by pressing the space bar, and the objective is to dodge the pipes as they move across the screen.
Please note that this is a simplified version of Flappy Bird and may not include all the features and complexities of the original game. However, it should give you a starting point to understand the basic mechanics and implement additional features if desired.