As an AI text-based model, I can provide you with a basic structure and outline for a simple JavaScript game implemented as a single HTML file, focusing on smartphone operation and the use of pictograms. Please note that constructing a complete 3D FPS game is beyond the scope of this response, as it requires extensive resources and expertise. However, you can build upon this structure to create your own game or explore further in your development. Here's a sample code:
Please note that this is just a basic framework, and you will need to fill in the game logic and rendering as per your requirements. The game loop can handle updating your game state and rendering graphics to create a more interactive experience. Feel free to modify and expand upon this code to create your envisioned game.