feat: scene built, basic function completed

Assets/scripts/CameraControllerY.cs

@@ -0,0 +1,24 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class CameraControllerY : MonoBehaviour
+{
+    [SerializeField] 
+    private float mouseSpeed = 500f;
+    
+    private float pitch = 0f;
+    
+    // Update is called once per frame
+    void Update()
+    {
+        float mouseY = Input.GetAxis("Mouse Y");
+        
+        pitch -= mouseY * mouseSpeed * Time.deltaTime;
+        
+        pitch = Mathf.Clamp(pitch, -90f, 30f);
+        
+        transform.localRotation = Quaternion.Euler(pitch, 0f, 0f);
+        
+    }
+}