add: Level and Game controllers base

update: scripts are now in folders

Assets/Scripts/Game/GameController.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+public class GameController : MonoBehaviour
+{
+    public List<LevelInfo> levels;
+}
+
+[Serializable]
+public class LevelInfo {
+    public SceneAsset scene;
+    public List<EnemyInLevel> enemies;
+}
+
+[Serializable]
+public class EnemyInLevel {
+    public GameObject enemy;
+    public int count;
+}