I've done some basics, yet I can't figure out how to get the bubbles moving more realistically. The original game used (hidden) air flow direction detectors. If any one wants to mess around with what I have so far, I'd appreciate any improvements or ideas how to achieve the bubble movement.

https://www.dropbox.com/s/azw0b430tf...Trial.mfa?dl=0

Someone has done a good atempt in this video, which shows what I'm after:

https://www.youtube.com/watch?v=GtwrKFSseak