Here's an example of how you can implement a game with 100 squares throwing boomerangs at each other. The game will be playable on all devices and will use pictograms. It will be a single HTML file enclosed in script tags, written in JavaScript.
To play the game, you can open the HTML file in a web browser on any device. The squares will be displayed as red squares initially. When you touch (or click) one of the squares, it will become blue, indicating that it has thrown a boomerang. After a delay, the boomerang will be passed to another random square, which will then throw it. The squares will also keep moving around the game container every second.