Bubble Bubble with unity

I'm recreating Bubble Bobble of 1986 with unity, but I came to a dead end, when I initialize my prefabs and run the code for shoot the bubble still in the start position, I tried on a few forums and tried some solutions including use "GetComponent .AddForce", but without success.

This is the code for the bubble:

 public class Shoot : MonoBehaviour
 {
     public Vector2 DistShoot;
     Animator animator;
 
     void Start()
     {
         animator = GetComponent<Animator>();
     }
 
     void FixedUpdate()
     {
         if (Input.GetKeyDown(KeyCode.X))
         {
             GetComponent<Rigidbody2D>().AddForce(DistShoot, ForceMode2D.Impulse);
         }
     }
 
     void Update ()
     {        
         if (Input.GetKeyDown(KeyCode.X))
         {
             animator.SetBool("Shoot", true);
         }
         else
         {
             animator.SetBool("Shoot", false);
         }
     }
 }

I'm a beginner, someone can help me suggesting a solution?