PlayerMove.FixedUpdate C# (CSharp) Method

    void FixedUpdate()
    {
        if (Input.GetKey(KeyCode.W)) {
            GetComponent<Rigidbody>().AddForce (transform.forward * 15f);
        }

        transform.Rotate ( 0f, Input.GetAxis ("Horizontal") * Time.deltaTime * 90f, 0f);
        //GetComponent<Rigidbody>().AddForce (transform.right * Input.GetAxis("Horizontal") * 25f);

        if (Input.GetKey (KeyCode.Space) && grounded) {
            GetComponent<Rigidbody>().AddForce (transform.up * 50f);
        }

        if (Physics.Raycast ( transform.position, -Vector3.up, 1.5f) ) {
            grounded = true;
        } else {
            grounded = false;
        }

        if (Input.GetKeyDown(KeyCode.LeftControl)) {
            Shoot ();
        }
    }