Thanks for the feedback. Glad you liked the intro we probably spent too much time on it for a jam but one goal was to learn GODOT so it was part of a process.
We tried to make the movement feel like you in a heavy suit unfortunately this has had the effect of making the game feel a bit clunky.
The pipe was done with bones and the goo was just sprites hidden at each intersection. A 9 slice that would stretch to fill then shrink (and move to the right) to empty. The eyes and nose are simple sprites that move along the access with a Sin adjustment on the x to make them appear to be swaying in and out of the goo. So it was a mix of code and animation.
GODOT made this pretty easy since we could call the functions on each pipe to run its sequence from the animation. This allowed us to work in the animator to get the timing to work.
Of the slime on the floor simply shrunk as it did the target in it the pipe was aiming at would shrink too.