add: Level and Game controllers base

update: scripts are now in folders

Assets/Scripts/Enemies/Enemy.cs

@@ -0,0 +1,11 @@
+using UnityEngine;
+
+public class Enemy : MonoBehaviour
+{
+    public float hp = 100f;
+
+    public void DealDamage(float damage) {
+        hp -= damage;
+        if (hp <= 0) Destroy(gameObject);
+    }
+}

Assets/Scripts/Enemies/Enemy.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 46894d927b8e6654487b876457ca8974