How to set up control in unity 2d?

Question

Unity

How to make an object move behind the player's finger, but at the same time keep a distance from him, a good example of such control in the game "No Humanity"

Answer 1

How to understand at a distance from him? There 2d world he can x and y. Ordinary touches (Input Touch) and Google, there are a lot of materials on the Internet how to do this