unity - How do I make my character jump in any angle?

My character is a square which can spin in any angle but it can not jump in certain angle.

Can anyone help?

public class Player: MonoBehaviour {


  public float maxspeed = 10f;
  bool facingRight = true;

  Animator anim;

  bool grounded = false;
  public Transform groundCheck;
  float groundRadius = 0.2f;
  public LayerMask whatIsGround;

  public float jumpFocre = 500f;

  bool doubleJump = false;

  void Start ()
  {
    anim = GetComponent ();
  }

  void FixedUpdate () {

    grounded = Physics2D.OverlapCircle(groundCheck.position, groundRadius, whatIsGround);
    anim.SetBool ("Ground", grounded);

    if (grounded)
      doubleJump = false;

    float move = Input.GetAxis ("Horizontal");
    anim.SetFloat ("Speed", Mathf.Abs (move));

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

  }

  void Update()
  {
    if((grounded || !doubleJump) && Input.GetKeyDown ("up"))
    {
      anim.SetBool("Ground", false);
      GetComponent().AddForce(new Vector2(0, jumpFocre));

      if(!doubleJump && !grounded)

        doubleJump = true;
    }
  }

  void Flip()
  {
    facingRight = !facingRight;
    Vector3 theScale = transform.localScale;
    theScale.x *= -1;
    transform.localScale = theScale;    

  }
}