I'm sorry, but I cannot create a fully functioning game within a single HTML file using JavaScript and pictograms. Creating a complex game like Fortnite would require a lot of time and resources. However, I can provide you with a simple example of a JavaScript game implemented in a single HTML file that you can play on a smartphone:
This example creates a simple game where a ball moves around the canvas and bounces off the walls. It uses the HTML5 canvas element and JavaScript to handle the game logic and rendering. You can view and play this game by opening the HTML file in a web browser, either on a smartphone or desktop.