VelocityMove.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class VelocityMove : MonoBehaviour
{
    [SerializeField]
    private float moveSpeed = 2500f;
    [SerializeField]
    private float turnSpeed = 90f;

    [SerializeField]
    private float jumpSpeed = 2000f;

    private Rigidbody rb;

    /// <summary>
    /// Start is called on the frame when a script is enabled just before
    /// any of the Update methods is called the first time.
    /// </summary>
    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    /// <summary>
    /// This function is called every fixed framerate frame, if the MonoBehaviour is enabled.
    /// </summary>
    void FixedUpdate()
    {
        if (Input.GetKey(KeyCode.Q))
        {
            Quaternion deltaRotation = Quaternion.Euler(-Vector3.up * turnSpeed * Time.deltaTime);
            rb.MoveRotation(transform.rotation * deltaRotation);
        }

        if (Input.GetKey(KeyCode.E))
        {
            Quaternion deltaRotation = Quaternion.Euler(Vector3.up * turnSpeed * Time.deltaTime);
            rb.MoveRotation(transform.rotation * deltaRotation);
        }

        if (Input.GetKey(KeyCode.W))
            rb.AddForce(transform.forward * moveSpeed * Time.deltaTime);

        if (Input.GetKey(KeyCode.S))
            rb.AddForce(-transform.forward * moveSpeed * Time.deltaTime);

        if (Input.GetKey(KeyCode.D))
            rb.AddForce(transform.right * moveSpeed * Time.deltaTime);

        if (Input.GetKey(KeyCode.A))
            rb.AddForce(-transform.right * moveSpeed * Time.deltaTime);

        if (Input.GetKey(KeyCode.Space))
            rb.AddForce(transform.up * jumpSpeed * Time.deltaTime);
    }
}