Марио, js первые ошибки

#pragma strict
 
    var Speed:float;
    var JumpSpeed:float;
    var GroundLayers:LayerMask;
    var isGrounded: boolean;
    private var m_Animator: Animator ;
    private var m_GroundCheck: Transform ;
    private var hSpeed:float;
 
function Start () {
m_Animator = GetComponent(Animator);
m_GroundCheck = transform.FindChild("GroundCheck");
}
 
 function Update()
    {
       isGrounded = Physics2D.OverlapPoint(m_GroundCheck.position, GroundLayers);
 
        if (Input.GetButton("Jump"))
        {
            if (isGrounded)
            {
                //rigidbody2D.AddForce(Vector2.up * JumpSpeed, ForceMode2D.Impulse);
                rigidbody2D.AddForce(new Vector2(0, 600));  
                isGrounded = false;
            }
        }
 
        m_Animator.SetBool("IsGrounded", isGrounded);
 
        hSpeed = Input.GetAxis("Horizontal");
 
        m_Animator.SetFloat("Speed", Mathf.Abs(hSpeed));
 
        if (hSpeed > 0)
        {
            transform.localScale = new Vector3(-1, 1, 1);
        }
        else if (hSpeed < 0)
        {
            transform.localScale = new Vector3(1, 1, 1);
        }
 
        this.rigidbody2D.velocity = new Vector2(hSpeed * Speed, this.rigidbody2D.velocity.y);
}