Project

Assets/Code/PassingObjects/Coin.cs

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+using System;
+using Code.GameplayServices;
+using UnityEngine;
+
+namespace Code.PassingObjects
+{
+    public class Coin : PassingObject
+    {
+        [SerializeField] private int countOnActivate;
+
+        private void OnTriggerEnter(Collider other)
+        {
+            PlayerScoreService.Instance.AddScore(countOnActivate);
+            PassingObjectsManager.Instance.KillChild(this);
+        }
+    }
+}

Assets/Code/PassingObjects/Coin.cs.meta

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+fileFormatVersion: 2
+guid: 9268e6ab4ed243439fd47dc649c5d0ab
+timeCreated: 1777831148

Assets/Code/PassingObjects/PassingObject.cs

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+using Code.GameplayServices;
+using UnityEngine;
+
+namespace Code.PassingObjects
+{
+    public class PassingObject : MonoBehaviour
+    {
+        private void FixedUpdate()
+        {
+            if (transform.position.z < PassingObjectsManager.Instance.BehindPlayerThreshold) 
+                PassingObjectsManager.Instance.KillChild(this);
+            
+            transform.position -= new Vector3(0, 0, GameplayManager.Instance.GameSpeed * Time.fixedDeltaTime);
+        }
+    }
+}

Assets/Code/PassingObjects/PassingObject.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: e01aa934ad27493aa737859fe6fe382d
+timeCreated: 1777827872

Assets/Code/PassingObjects/Wall.cs

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+using Code.GameplayServices;
+using UnityEngine;
+
+namespace Code.PassingObjects
+{
+    public class Wall : PassingObject
+    {
+        private void OnTriggerEnter(Collider other) => GameplayManager.Instance.PlayerDead();
+    }
+}

Assets/Code/PassingObjects/Wall.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 102f91b6848f4161b7f4fb9681c2bc79
+timeCreated: 1777833598