Sure, here's an example of a simple car racing game implemented as a single HTML file using JavaScript.
This code creates a simple car racing game where the player controls a blue car using the left and right arrow keys. The goal is to avoid colliding with randomly generated enemy cars coming from the top of the screen.
The game is enclosed in `
` tags and starts when the `DOMContentLoaded` event is fired. The car's position is updated based on the keydown events. The enemies are created using `createEnemy()` function and moved downwards using `moveEnemies()` function. The game ends if the player's car collides with any enemy car.
Please note that this is a basic example and can be further enhanced and customized according to your preferences.