Sure! Here's an example of a simple 3D exploring game implemented as a single HTML file using JavaScript. Note that this is a basic example and does not include any complex features or advanced graphics.
To play this game, you can open the HTML file in a web browser, preferably from a smartphone. The game creates a simple 3D scene with a green box, and you can explore the scene by moving your smartphone. The movement is controlled using the device's orientation.