Sure, here's a simple 3D car game implemented as a single HTML file using JavaScript:
This code creates a simple game where the player can control a red car using the left and right arrow keys. The car can move horizontally within a container div. The game starts automatically upon loading the HTML file and stops when the browser tab or window is closed.
Note: Since pictograms weren't mentioned, this implementation uses basic HTML styling to represent the car as a red rectangle.