How to do Bezier splines or Pixel manipulations ?

Hello,

Let's take for example exotics gameplay like LocoRoco or Gish.
In fact i'm very interested about all of these games with a better gameplay than awesome graphic (You know what i mean, those tiny experimental games and so on).

Ok, put the TGB physics problems part away for the moment.

Levels and others statics objects can be easily achieve, but what solution do we have for all of these dynamics stuff like water, "blob", rope, etc. ?
What to do if in my game i need those impredictable forms objects ?

Bezier splines ?
Pixels ?

Some of you are about to say "sources and C++", but unfortunately i can't do C++ :(
TorqueScript seem's pretty fast enough to handle one or two (maybe more) objects of that kind at the same time. So is it possible to get access to those manipulation ?

There was a primitives mod for TGB but i can't find it anymore (though i preffer not tweaking the engine... But if this the only solution).

Thanks.