This asset helps you create 2D stickman and also more.
There is a component called LinearLimb, It takes 3 GameObjects as Handles, and draws a straight/curved line along these handles. It has many parameter for creating a suitable shape.You can use LinearLimb as an arm, leg and spine.
Easier Animating: Don't need to rotate Bones, Just move Handles.
Transformation: You can animate LinearLimb parameters to change colors and the shape of your character. (e.g. Hulk Transformation)
No Ragdoll Physics: You can't create ragdoll because characters are made of Handles not Bones.