How to drop an object with touch?

Question

Unity

I'm making a game. I'm trying to make it possible to launch an object with a finger across the playing field, like in curling for example. The script doesn't work. (
I tried this code (but the Stone1 object is still standing still, the privatization of the game)
public class Stone : MonoBehavior {
public float speed;
private Vector2 Stone1;

public Regidboqy2D RenderBuffer { get; private set;}

private void Start()
{
RenderBuffer = Get Component();
}

void Update ()
{
Vector2 moveImput = new Vector2 (Input.GetAxRaw("Horizontal"), Input.GetAxRaw("Vertical"));
Stone1 = moveImput.normalized * speed;
}

}

When you click on an object, it increases in size and that's all(