Sure, here's an example of a simple 3D racing game implemented as a single HTML file using JavaScript and enclosed in script tags:
In this game, you control a car (represented by an image) as it moves up on a 3D road. The road is a gray rectangle scrolling towards the car. You need to avoid reaching the top of the screen, as it will trigger a game over alert.
Note: Please make sure to replace "emozi_all/car.png" with the actual path to your car image file.