Sure, below is an example of a simple 3D game implemented in a single HTML file using JavaScript. Please note that this is a very basic implementation and does not include any external libraries or advanced features.
Please note that this code assumes you have an image file named "emozi_all/pictogram.png" in the same directory as the HTML file. You may replace it with an actual image of Harley Quinn.
To run the game, save the code as an HTML file (.html) and open it in a web browser on your smartphone. You'll be able to control the movement of Harley Quinn by touching and dragging on the canvas.
Important: Please note that the provided code is just a basic example and will not provide a fully functional game experience. It serves as a starting point for further development and improvements based on your specific requirements.