hey!
do you mean the movement of it?
it's a combination of procedural animation and inverse kinematics, specifically i used forward and backwards reaching inverse kinematics with some constraints.
was my first time doing it and by far the hardest part of the project for me LOL
for the rendering i used unity's line renderer to show the vectors nicely and i put a split vine sprite-material the talented artist @artysaur made :3c