Sure! Here's an example of a game where balls and squares float and move on the screen, colliding with each other, constantly fading away, changing colors, sizes, shapes, and splitting into smaller ones. The shapes also constantly fade into existence. This game is designed for smartphone operation and uses pictograms.
You can save the above code in a single HTML file and open it in a web browser to see the game in action. The shapes will float, collide, fade away, change colors, sizes, and shapes continuously.