2D character controller script not working?

Hey, I'm trying to make a 2D character controller, I'm running into a lot of errors, does anyone see what the issue is?

 using UnityEngine;
 using System.Collections;
 
 
 public class RobotControllerScript : 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 jumpForce = 700f;
 
     bool doubleJump = false;
 
     void Start ()
     {
         anim = GetComponent<Animator> ();
     }
     void FixedUpdate ()
     {
         grounded = Physics2D.OverlapCircle (groundCheck.position, groundRadius, whatIsGround);
         anim.SetBool ("Ground", grounded);
 
         if (grounded)
             doubleJump = false;
         anim.SetFloat ("vSpeed", Rigidbody2D.velocity.y);
 
         if(!grounded) return;
 
         float move = Input.GetAxis ("Horizontal");
 
         anim.SetFloat ("Speed", Mathf.Abs (move));
         Rigidbody2D.velocity = new Vector2(move + maxSpeed, Rigidbody2D.velocity.y);
 
         if (move > 0 && !facingRight)
             Filp ();
         else if (move < 0 && facingRight)
             Filp ();
     }
     void Update ()
     {
         if ((grounded || !doubleJump) && Input.GetKeyDown (KeyCode.Space)) 
         {
             anim.SetBool("Ground", false);
             Rigidbody2D.AddForce(new Vector2(0, jumpForce));
             if(!doubleJump && !grounded)
                 doubleJump = true;
         }
     }
     void Flip()
     {
         facingRight = !facingRight;
         Vector3 theScale = Transform.localScale;
         theScale.x *= -1;
         Transform.localScale = theScale;
     }
 }