As a language model AI, I can help guide you on how to create a simple mobile port of the game Five Nights at Freddy's (FNAF) in a single HTML file using JavaScript. Please note that creating a full game like FNAF may require advanced programming knowledge, extensive design, and more complex code structure. However, I can provide a starting point for you to build upon.
Here's a simple template for your HTML file, incorporating JavaScript within the script tags:
In this template, you can add your CSS styles for the game UI inside the `<style>` tags. Similarly, you can add your JavaScript game logic inside the `
` tags. This is where you would handle user input, update game state, render graphics, and incorporate functionalities like timers or score tracking.
The `gameLoop` function is responsible for continuously updating and rendering the game. This function is called repeatedly using `requestAnimationFrame`, providing a smooth gameplay experience.
Remember to replace the comment placeholders (`/* CSS styles for your game UI */`, `// JavaScript code for your game`, `// Update game state`, etc.) with your actual implementations.
Please note that developing a complete port of FNAF with all its features would require a considerable amount of time and effort. This template provides a starting point, and you would need to implement the specific mechanics, animations, and interactions yourself.