Introducing a score limit and bugfixes

Assets/Scripts/ForceZone.cs

@@ -5,6 +5,7 @@ using UnityEngine;
 public class ForceZone : MonoBehaviour
 {
     public float force = 0;
+    public GameObject player;
     // Start is called before the first frame update
     void Start()
     {
@@ -19,8 +20,13 @@ public class ForceZone : MonoBehaviour
 
     private void OnTriggerStay(Collider other)
     {
-        Vector3 direction = other.transform.position - this.transform.position;
+        Vector3 direction = other.transform.position - this.player.transform.position;
         Debug.DrawRay(this.transform.position, direction);
-        other.transform.GetComponent<Rigidbody>().AddForce(direction.normalized * this.force * Time.deltaTime, ForceMode.Impulse);
+
+        Rigidbody otherRigidbody = other.transform.GetComponent<Rigidbody>();
+        if (otherRigidbody)
+        {
+            other.transform.GetComponent<Rigidbody>().AddForce(direction.normalized * this.force * Time.deltaTime, ForceMode.Impulse);
+        }
     }
 }