Hi! It always zooms out the way all linked balls fit the screen with some space around them. If it doesn’t work that way for you then please provide more info like on what platform are you running, some screenshots, etc..
This is what I see after a couple of circles. Running on windows 10, 1920x1080 resolution, 120hz. Maybe it's something to do with framerate, the game is likely running at 120fps since it goes fullscreen automatically.