There's no liquid morphing going on there just simple particle systems that can be manually handled. The "liquids" are just circle shapes that appear to handle surface tension only in one video (which isn't hard to recreate) and the "barrier" shapes are just connected using standard box2D commands we already have. I could copy every scene in that video in AppGameKit no problem. If I get time I will but I have a few paid side projects to finish first. If you take the time to look at what is being done by this you'll see it's not so amazing.
I created some liquid "blob" code where the player could control a blob creature that was made of similar particles with surface tension. You could even make the thing jump and climb with a little practice. I'm pretty sure I could emulate any of these videos with the basic AppGameKit command set. I've also created physics based particle systems in AppGameKit to handle "smoke" that would flow around other physics sprites.
Just use some imagination and experiment. It's not so hard to use box2D for this kind of thing...
