feat: scene built, basic function completed

Assets/scripts/CameraControllerX.cs

@@ -0,0 +1,18 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class CameraControllerX : MonoBehaviour
+{
+    [SerializeField] 
+    private float mouseSpeed = 20f;
+    
+    void Update()
+    {
+        float mouseX = Input.GetAxis("Mouse X");
+        
+        transform.Rotate(Vector3.up * (mouseX * mouseSpeed));
+
+        
+    }
+}