Sure! Here's an example of a simple generative art game implemented in a single HTML file using JavaScript and enclosed in script tags:
This game generates a random generative art piece consisting of randomly colored squares every time the user touches the screen on their smartphone. The canvas size is set to match the screen size, ensuring it fits perfectly on a smartphone.
Note: This is a basic example of generative art and can be expanded upon or modified to include more complex patterns, animations, or user interactions.