diff --git a/Assets/Scripts/Mechanics/GameOptimizer.cs b/Assets/Scripts/Mechanics/GameOptimizer.cs
index 91a4cd7..6a7ae66 100644
--- a/Assets/Scripts/Mechanics/GameOptimizer.cs
+++ b/Assets/Scripts/Mechanics/GameOptimizer.cs
@@ -30,8 +30,8 @@ namespace Platformer.Mechanics
         [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
         static void SetupJumpThroughPlatforms()
         {
-            // BT5-Dev #44 — 일반 지면(Level Tilemap) Layer 0 일반 충돌 + 공중 발판(Foreground·별개 BoxCollider2D)만 Layer 16
-            int applied = 0, excluded = 0, levelKept = 0;
+            // BT5-Dev #45 — Level Tilemap 영역 Layer 16 복원 (PD 의도: 점프 영역 통과·footHit 영역 영역 영역). Tilemap 단일 GameObject = 모든 Tile 동일 동작.
+            int applied = 0, excluded = 0;
             var allColliders = Object.FindObjectsByType<Collider2D>(FindObjectsSortMode.None);
             var appliedNames = new System.Collections.Generic.List<string>();
             foreach (var c in allColliders)
@@ -49,35 +49,28 @@ namespace Platformer.Mechanics
                     continue;
                 }
 
-                // BT44 — Level Tilemap (TilemapCollider2D) = 일반 지면 Layer 0 그대로 (Drop-Through 영역 외)
-                if (c.GetComponent<UnityEngine.Tilemaps.TilemapCollider2D>() != null && c.gameObject.name == "Level")
-                {
-                    if (c.gameObject.layer == 16) c.gameObject.layer = 0;  // BT38·BT40·BT43 잔존 복원
-                    levelKept++;
-                    continue;
-                }
-
                 var effector = c.GetComponent<PlatformEffector2D>();
                 if (effector != null) Object.Destroy(effector);
                 c.usedByEffector = false;
 
+                // BT5-Dev #45 — 모든 일반 Collider(Level Tilemap 포함) Layer 16 (PD 의도: 점프 영역 통과·footHit 영역 영역)
                 c.gameObject.layer = 16;
                 applied++;
                 if (appliedNames.Count < 8) appliedNames.Add($"{c.gameObject.name}({c.GetType().Name})");
             }
 
-            // BT44 — Foreground GameObject(시각만·Collider 미부착) → TilemapCollider2D 동적 추가 + Layer 16 (공중 발판)
+            // BT45 — Foreground 영역 미부착 시 TilemapCollider2D 동적 추가 + Layer 16
             var foreground = GameObject.Find("Foreground");
             if (foreground != null)
             {
                 var fgTc = foreground.GetComponent<UnityEngine.Tilemaps.TilemapCollider2D>();
                 if (fgTc == null) fgTc = foreground.AddComponent<UnityEngine.Tilemaps.TilemapCollider2D>();
                 foreground.layer = 16;
-                Debug.Log($"[BT44-Foreground] TilemapCollider2D + Layer 16 applied to 'Foreground'");
+                Debug.Log($"[BT45-Foreground] TilemapCollider2D + Layer 16 applied to 'Foreground'");
             }
 
-            Debug.Log($"[BT44-DropThrough] Layer16 applied={applied} levelKeptLayer0={levelKept} excluded={excluded} total={allColliders.Length}");
-            Debug.Log($"[BT44-DropThrough] appliedSamples=[{string.Join(", ", appliedNames)}]");
+            Debug.Log($"[BT45-DropThrough] Layer16 applied={applied} excluded={excluded} total={allColliders.Length}");
+            Debug.Log($"[BT45-DropThrough] appliedSamples=[{string.Join(", ", appliedNames)}]");
         }
     }
 }