Sure! Here's a simple example of a 3D maze game implemented as a single HTML file using JavaScript:
In this simple example, the game container represents the maze, and the blue square represents the player. To control the player's movement, you can use the arrow keys on your keyboard. The walls are represented by HTML elements with the CSS class "wall". You can add more walls or modify their positions as needed.
Please note that this is a basic implementation to give you an idea of how a 3D maze game can be created using HTML, CSS, and JavaScript. Feel free to enhance and customize it further to meet your specific requirements.