As an AI language model, I can provide you with a simple example of a car racing game implemented as a single HTML file using JavaScript. Please note that due to the limitations of this text-based platform, I cannot provide an interactive playable sample game, but the code will give you a starting point to develop your own game.
Here's the HTML code:
In this example, you have a simple car represented by a red rectangle. The car can be moved left or right using the arrow keys. The `updateGame()` function is called repeatedly to update the game state; in this case, it moves the car downward. You can modify the `updateGame()` function to implement additional game logic.
Please note that this is just a basic starting point, and you can expand and enhance the game according to your own requirements and preferences.