Need a 2D Rigid Body Controller Script

So I'm working on a Sonic game, which I just got my sprites and what-not imported, and I'm finally at the moment where I need a script to move the character. No matter what videos I've watched or scripts I've tried writing, nothing seems to work for me.

I'm new at this myself, and here's what I got from a video. Sadly I a few of the characters he used, so I'm not sure if I even typed the right char to end it.

using UnityEngine; using System.Collections;

public class NewBehaviourScript : MonoBehaviour {

 public float moveSpeed;
 public float jumpHieght;
 public Rigidbody2D rigidBody2D;

 // Use this for initialization
 void Start () {
     rigidBody2D = GetComponent<rigidBody2D> ();
 }
 
 // Update is called once per frame
 void Update () {
     if(Input.GetKeyDown (KeyCode.Space)){
     (
             GetComponent<Rigidbody2D>().velocity = new Vector2(0. JumpHeight);
 }

}

If anyone can help out, so much would be appreciated! :) Thanks in advance!