diff --git a/unity/Assets/Prefabs/Bird.prefab b/unity/Assets/Prefabs/Bird.prefab
index 9e18e92..074e4e7 100644
--- a/unity/Assets/Prefabs/Bird.prefab
+++ b/unity/Assets/Prefabs/Bird.prefab
@@ -28,7 +28,7 @@ Transform:
   m_GameObject: {fileID: 8800180563921210508}
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 1137.7001, y: 597.95557, z: 0}
-  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_LocalScale: {x: -1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}
   m_RootOrder: 0
diff --git a/unity/Assets/Scripts/Bird.cs b/unity/Assets/Scripts/Bird.cs
index 546907f..e2a5d79 100644
--- a/unity/Assets/Scripts/Bird.cs
+++ b/unity/Assets/Scripts/Bird.cs
@@ -4,7 +4,7 @@ using UnityEngine;
 
 public class Bird : MonoBehaviour
 {
-    const float horizontalSpeed = 200f;
+    const float horizontalSpeed = 100f;
     const float verticalSpeed = 5f;
     const float amplitude = 30f;
 
diff --git a/unity/Assets/Scripts/Fireball.cs b/unity/Assets/Scripts/Fireball.cs
index b5acc19..a282094 100644
--- a/unity/Assets/Scripts/Fireball.cs
+++ b/unity/Assets/Scripts/Fireball.cs
@@ -7,7 +7,9 @@ public class Fireball : MonoBehaviour
 {
     DragonMovement.AttackType _attackType = DragonMovement.AttackType.FIREBALL;
     float _lifeSpan = 0f;
+    GameObject _follow = null;
     public DragonMovement.AttackType AttackType { get => _attackType; set => _attackType = value; }
+    public GameObject Follow { get => _follow; set => _follow = value; }
 
     // Start is called before the first frame update
     void Start()
@@ -18,6 +20,11 @@ public class Fireball : MonoBehaviour
     // Update is called once per frame
     void Update()
     {
+        if (_follow != null)
+        {
+            this.transform.position = _follow.transform.position;
+        }
+
         _lifeSpan += Time.deltaTime;
         float speed = 1000f; //fireball
         if (_attackType == DragonMovement.AttackType.CONE)
@@ -34,7 +41,7 @@ public class Fireball : MonoBehaviour
         transform.position = new Vector3(transform.position.x + speed * Time.deltaTime, transform.position.y, transform.position.z);
 
 
-        if (_lifeSpan >= 0.8f)
+        if (_lifeSpan >= 1.8f)
         {
             GameObject.Destroy(this.gameObject);
         }