Sure, here's an example of a simple game about go-karting races implemented as a single HTML file. It includes JavaScript enclosed in script tags:
Note that this is a simplified example and does not include the go-kart selection, map options, or background music. It only demonstrates the basic mechanics of a go-kart racing game with a first-person view in a browser. To enhance the game with additional features, you would need to modify and expand the code accordingly.