Sure! I can create a simplified version of the classic game Flappy Bird using JavaScript within a single HTML file. Please find the code below:
Please note that in order to make this code work properly, you need to have `emozi_all/bird.png` and `emozi_apple.png` images in the same folder as the HTML file. These images should represent your custom pictograms/icons for the bird and pipe respectively.
When you open the HTML file in your smartphone's browser, you can tap on the screen to make the bird jump and navigate through the pipes. Your goal is to avoid collisions and achieve the highest score possible.