Sure! Here's an example of a simple 2D car racing game implemented as a single HTML file with JavaScript, enclosed in script tags:
In this game, you can control the player car (represented by a blue rectangle) using the left and right arrow keys. The other cars (represented by red rectangles) will move randomly on the screen. You can customize the list of cars by modifying the `cars` array.
Please note that this is a basic implementation and you can add more features, improve the graphics, and enhance the gameplay as per your requirements.