Likely not intentional but you can change the size of your window/constantly fullscreening/windowing to interact with the bubbles in hopes of a better score or getting yourself out of a pinch. Be careful though that messing with it to much can cause the bubbles to go out of bounds or straight up remove moderately sized bubbles from the bottom.
REALLY hoping the creator could implement a way to shake the screen without having to use this minor glitch in sides for some kind of consequence