As a programmer, I would create a simple game using JavaScript and HTML. Here's an example implementation:
This game creates particles as objects on a canvas, randomly moving around the screen and bouncing off the edges. The particles are represented as red circles on the canvas.
You can open this code in a web browser or in a text editor and save it with a ".html" extension. When you open the saved file in a browser, you will see the game in action, with particles moving around and bouncing off the walls.