Sure! Here's an example of a game with 10 never-ending bouncing balls that make a sound. The game will be implemented as a single HTML file using JavaScript and enclosed in script tags. Since the game is designed for smartphone operation, we'll use pictograms to represent the balls.
Please note that the sounds used in the game should exist in the same directory as the HTML file, and their filenames should be updated accordingly in the `ballSounds` array.