Accessing gameObject through playerscript with button attached to the playerscript C#

Hey! I am rather new to Unity and I've been creating this silly CatGame that is meant to be played by mobiledevices. There are 2 buttons in the actual game: Jump (that works perfectly) and Drop(and this is the problem. So I have the function for the Drop in my playerscript where from I call the Drop function in the Button. The problem is that the function calls another function that is attached to a gameObject that I want to interact with. For some reason I don't even get a Debug when the button is pressed...?

So simple: I want the cat to drop the item off the table by either using isKinematic = false; or Destroy. :) Been working with this for some time now so any help is most welcome!

In the playerscript the function called by the button:

     public void DropButton()
     {
         GoodObject DropItem = gameObject.GetComponent<GoodObject>();
 
         if (gameObject.layer == LayerMask.NameToLayer("Item"))
         {
 
             DropItem.Destroy();
             Debug.Log("buttonDown!");
 
         }
     }

And the script for the Item:

 using UnityEngine;
 using System.Collections;
 
 public class GoodObject : MonoBehaviour {
 
     public int pointsToAdd;
     public Rigidbody2D itemRB;
 
     void Start() {
         Rigidbody2D itemRB = GetComponent<Rigidbody2D>();
         itemRB.isKinematic = true;
         Physics2D.IgnoreLayerCollision(LayerMask.NameToLayer("Item"), LayerMask.NameToLayer("Table"));
     }
 
 
 //Function called by the playerscript on buttonClick
     public void Destroy()
     {
         ScoreManager.AddPoints(pointsToAdd);
         itemRB.isKinematic = false;
         
     }
 }