Admittedly, the objects in this game don't look too much like bubbles and they don't sound like them when they pop either. That's too bad because there is something satisfying about the sound of bubbles popping. Isn't that why people like popping bubble wrap - both in the real world and online?
If it was just making any old noise that thrilled people, you would find people just sitting there crinkling packing paper, rustling cardboard boxes, or affixing masking tape to their hair and screaming as they rip it off. But I digress.
Enjoy shooting these bubbles - especially if you like the sounds of lasers!