Sure! Here's an example of a simple car game implemented as a single HTML file with JavaScript:
Car Game
In this game, you control a car using the left and right arrow keys on your smartphone. The goal is to dodge the blue obstacles that come down from the top of the screen. If the car hits any obstacle, the game is over and your score is displayed.
The game is enclosed in script tags and uses the HTML5 `<canvas>` element for drawing the road and car. The JavaScript code handles the car movement, obstacle generation, and collision detection to provide a playable car game.