I wish the chain were more clearly visible. A few times I thought I got stuck, only to realize that they're chained together.
Viewing post in Ghost on Chain jam comments
Are you using Godot?
I have used a Line2D to link the orbs in my game, you could use one too. I have the code on Github if you want to see how I did it (just look at the Line2D node called "Link" inside the World.tscn scene)
https://github.com/gabriele6/Nebulasteroids
EDIT: nevermind I see you're using Unity