Sure! Here's an example of a simple car game implemented in a single HTML file using JavaScript and enclosed in script tags:
To play the game, you would open the HTML file in a web browser on your smartphone. The game consists of a red car at the bottom of the game area. The objective is to avoid the obstacles (represented by black squares) that fall from the top. You can control the car's movement by swiping left or right on your smartphone's screen. The game will end if the car collides with an obstacle or when an obstacle reaches the bottom of the game area.