Sure! Here's a simple implementation of Flappy Bird using emojis as pictograms within a single HTML file:
You can copy and paste this code into a single HTML file, save it, and open it in a web browser. The game should start automatically and you can control the bird by tapping the spacebar. The objective is to navigate the bird through the gaps in the cacti-like pipes without colliding with them. The score is displayed at the top of the screen, and the game ends when the bird collides with a pipe.