Sure! Here's an example of a simple implementation of Flappy Bird as a single HTML file, using JavaScript and pictograms:
In this implementation, the game is displayed inside a `<div>` with the id "game". The bird is represented as a stylized `<div>` element with a background image. The pipes are represented as stylized `<div>` elements that move from right to left using CSS animations. The game loop updates the bird's position and handles collision detection.
Please note that this is a simplified version of Flappy Bird and it may not include all the features of the original game. You may need to further enhance it if you want to add more functionalities or levels.