Sure! Here's an example of a simple game using JavaScript that you can play on any device, including smartphones. It consists of 100 squares throwing boomerangs at each other, and if you touch one of the squares, they will throw one back.
To play the game, simply copy the code above and save it as an HTML file (e.g., `boomerang_game.html`). Open the file in any web browser, and you'll see a grid of 100 squares. If you touch any of the squares on your smartphone, it will throw a boomerang by displaying the boomerang symbol for 1 second.
Note that this is a basic implementation, and you can customize it further to add more gameplay mechanics or graphics as per your requirements.