Sure, here's an example of a simple car crash game implemented as a single HTML file using JavaScript. Note that this is a simplified version and for entertainment purposes only.
To run the game, copy the above code into a new HTML file, save it with a `.html` extension (e.g., `car-crash-game.html`), and open the file in a web browser. You can control the car using the left and right arrow keys on your smartphone's keyboard, and the goal is to avoid crashing into the moving obstacle.