Sure! Here's an example of a simple generative art game implemented using a single HTML file with JavaScript:
This game will generate random shapes (circles or squares) of random sizes and colors on the canvas. The canvas size is set to the size of the device's screen, making it suitable for smartphone operation. The game loop continuously redraws the canvas at a high frame rate, creating an interactive generative art experience. You can play the game by opening the HTML file in a web browser on your smartphone.