upd

Assets/Scenes/Menu/Menu.unity

@@ -9192,7 +9192,7 @@ MeshCollider:
   m_LayerOverridePriority: 0
   m_IsTrigger: 0
   m_ProvidesContacts: 0
-  m_Enabled: 1
+  m_Enabled: 0
   serializedVersion: 5
   m_Convex: 0
   m_CookingOptions: 30
@@ -9356,6 +9356,14 @@ PrefabInstance:
       propertyPath: m_Name
       value: SinglePlayer
       objectReference: {fileID: 0}
+    - target: {fileID: 8370227802790125322, guid: 22aace1332feb514b823ccbdd87e8439, type: 3}
+      propertyPath: runSpeed
+      value: 200
+      objectReference: {fileID: 0}
+    - target: {fileID: 8370227802790125322, guid: 22aace1332feb514b823ccbdd87e8439, type: 3}
+      propertyPath: walkSpeed
+      value: 200
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -10624,7 +10632,7 @@ MeshCollider:
   m_LayerOverridePriority: 0
   m_IsTrigger: 0
   m_ProvidesContacts: 0
-  m_Enabled: 1
+  m_Enabled: 0
   serializedVersion: 5
   m_Convex: 0
   m_CookingOptions: 30

Assets/Scripts/Player/CameraController.cs

@@ -29,7 +29,7 @@ namespace Player
             if (Cursor.lockState == CursorLockMode.Locked)
             {
                 transform.Rotate(Vector3.up * mouseX);
-                _camera.transform.localRotation = Quaternion.Euler(_xRotation, 0f, 0f);
+                _cameraTransform.localRotation = Quaternion.Euler(_xRotation, 0f, 0f);
                 _cameraTransform.rotation = Quaternion.Euler(_xRotation, transform.eulerAngles.y, 0f);
                 _cameraTransform.position = targetCameraPosition.position;
             }

Assets/Scripts/Player/Movement.cs

@@ -1,14 +1,11 @@
-using Mirror;
-using Player.States;
-using StateMachine;
 using UnityEngine;
 
 namespace Player
 {
     public class Movement : MonoBehaviour
     {
-        public float walkSpeed = 400f;
-        public float runSpeed = 1200f;
+        public float walkSpeed;
+        public float runSpeed;
         public float jumpForce = 160f;
         public float groundCheckRadius = 0.14f;
         public Transform groundCheck;
@@ -25,6 +22,7 @@ namespace Player
             playerRigidbody = GetComponent<Rigidbody>();
         }
 
+        private Vector3 _velocity;
         void Update()
         {
             isGrounded = Physics.CheckSphere(groundCheck.position, groundCheckRadius, groundLayer);
@@ -34,11 +32,14 @@ namespace Player
                 playerRigidbody.AddForce(Vector3.up * jumpForce, ForceMode.Impulse);
             }
             
-            Vector3 velocity = moveDirection * (walkSpeed * Time.deltaTime);
+            _velocity = moveDirection * (walkSpeed * Time.fixedDeltaTime);
+        }
 
+        private void FixedUpdate()
+        {
             if (Cursor.lockState == CursorLockMode.Locked)
             {
-                playerRigidbody.velocity = new Vector3(velocity.x, playerRigidbody.velocity.y, velocity.z);
+                playerRigidbody.velocity = new Vector3(_velocity.x, playerRigidbody.velocity.y, _velocity.z);
             }
         }
 

ProjectSettings/ProjectSettings.asset

@@ -103,7 +103,7 @@ PlayerSettings:
   xboxEnableFitness: 0
   visibleInBackground: 1
   allowFullscreenSwitch: 1
-  fullscreenMode: 0
+  fullscreenMode: 1
   xboxSpeechDB: 0
   xboxEnableHeadOrientation: 0
   xboxEnableGuest: 0