I need help working out a C# script with error CS0120

I have recently created the following script
to make my character object move in either direction and also flip his sprite when moving left if facing right and visa versa

//variables are being set
public float maxspeed = 10f;
bool facingright = true;

// Use this for initialization
void Start () {

}

// Update is called once per frame
void FixedUpdate ()
{
    float move = Input.GetAxis("horizantal");

    UnityEngine.Rigidbody2D.velocity = new Vector2(move * maxspeed, UnityEngine.Rigidbody2D.velocity.y);

    if (move > 0 && !facingright)
        Flip();
    else if (move < 0 && facingright)
        Flip();
}
//flips the player when they're facing left
void Flip()
{
    facingright = !facingright;
    Vector3 theScale = transform.localScale;
    theScale.x *= -1;
    transform.localScale = theScale;

}

}

However i get error CS0120 and I can’t figure out how to fix it.

It would be better to ask the question pinpointing where the error is thrown, and indicating the complete error message.

At any rate, this is incorrect:

float move = Input.GetAxis("horizantal");

It should be

float move = Input.GetAxis("Horizontal");