PlayerMovement

using System.Linq;
using UnityEngine;

public class PlayerMovement : MonoBehaviour {

    public float speed;
    public float jumpHeight;
    public float gravity = 20f;

    [Space]

    public Transform cameraTransform;
    public float horizontalSensitivity = 1f;
    public float verticalSensitivity = 1f;
    public float pitchMin = -70f;
    public float pitchMax = 80f;

    [Space]

    public float _fallY = -20f;

    private CharacterController _controller;
    private Vector3 _input;
    private Vector3 _verticalVelocity;
    private Vector3 _yawVector;
    private Vector3 _currentPitch;

    private void Start() {
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;

        _controller = GetComponent<CharacterController>();
        _currentPitch = cameraTransform.localEulerAngles;
    }

    private void Update() {
        if (transform.position.y < _fallY) {
            var points = FindObjectsOfType<RespawnPoint>();
            if (points.Length > 0) {
                var nearest = points.OrderBy(respawn => Vector3.Distance(transform.position, respawn.transform.position)).FirstOrDefault();
                _controller.enabled = false;
                transform.SetPositionAndRotation(nearest.transform.position, nearest.transform.rotation);
                _controller.enabled = true;
                _verticalVelocity.y = 0f;

            } else {
                Debug.LogError("No respawns found");
            }
        }

        MoveUpdate();
        LookUpdate();
    }

    private void MoveUpdate() {
        bool isGrounded = _controller.isGrounded;

        _input.x = Input.GetAxisRaw("Horizontal");
        _input.z = Input.GetAxisRaw("Vertical");
        _input.Normalize();

        if (_verticalVelocity.y < -2f && isGrounded)
            _verticalVelocity.y = -1f;

        Vector3 moveVector = transform.forward * _input.z + transform.right * _input.x;
        _controller.Move(speed * Time.deltaTime * moveVector);

        if (Input.GetKeyDown(KeyCode.Space) && isGrounded) {
            _verticalVelocity.y = Mathf.Sqrt(jumpHeight * 2f * gravity);
        }

        _verticalVelocity.y -= gravity * Time.deltaTime;
        _controller.Move(_verticalVelocity * Time.deltaTime);
    }

    private void LookUpdate() {
        _yawVector.y = Input.GetAxis("Mouse X") * horizontalSensitivity;
        float pitch = Input.GetAxis("Mouse Y") * verticalSensitivity;

        transform.Rotate(_yawVector);

        _currentPitch.x = Mathf.Clamp(_currentPitch.x - pitch, pitchMin, pitchMax);
        cameraTransform.localEulerAngles = _currentPitch;
    }
}