웨이브 난이도 곡선 수정

- InitialCost: 4=>5
- costIncreaseRate: 10=>12%

Assets/Prefabs/EnemyPortal.prefab

@@ -78,8 +78,8 @@ MonoBehaviour:
   destroyEffectPrefab: {fileID: 0}
   effectSpawnPoint: {fileID: 0}
   monsterEntries: []
-  initialCost: 4
-  costIncreaseRate: 10
+  initialCost: 5
+  costIncreaseRate: 12
 --- !u!1001 &606055883085645919
 PrefabInstance:
   m_ObjectHideFlags: 0

Assets/Scripts/EnemyPortal.cs

@@ -42,9 +42,9 @@ using UnityEngine;
 
         [Header("Cost Settings")]
         [Tooltip("시간당 코스트 시작 값")]
-        [SerializeField] private float initialCost = 4f;
+        [SerializeField] private float initialCost = 5f;
         [Tooltip("사이클마다 코스트 증가율 (%)")]
-        [SerializeField] private float costIncreaseRate = 10f;
+        [SerializeField] private float costIncreaseRate = 12f;
 
         private float currentCost;