Sure! Here's an example of a Flappy Bird game implemented as a single HTML file using JavaScript and pictograms:
Please note that in this example, you would need to provide your own pictograms for the bird and pipe images. The game loop continuously updates the bird's position based on gravity and handles key presses to make the bird jump. The score increases with each frame, and collision detection is performed to check if the bird hits the ground. When the game is over, a "Game Over" message is displayed on the canvas.