Unity52D - Player Jump Bug

Hey there,

So basically I am new to everything here, and I am trying to follow a site called Lynda.com. They have a special series of video's about creating an endless runner in Unity 5 2D.

Now as they started with the player I noticed the jump has some critical issue. Since i do not know the syntax or if there is a special feature I have to turn off here on unity I came to ask here.

A video of what the problem is:

https://youtu.be/gKFxLKaKsj8

Basically, that's not supposed to happen, the player should just jump striaght up and if the player gets pushed back a little bit, there is a fix to his X axis pushing him forwards.

Inspector insight - on the player.

http://i.imgur.com/FkcAhSC.png

The only scripts that touch the player:

using UnityEngine; using System.Collections; public class Jump : MonoBehaviour {

     public float jumpSpeed = 240f;
     public float forwardSpeed = 20;
 
     private Rigidbody2D body2d;
     private InputState inputstate;
 
     void Awake ()
     {
         body2d = GetComponent<Rigidbody2D>();
         inputstate = GetComponent<InputState>();
 
     }
 
     void Update ()
     {
     if(inputstate.standing)
         {
             if(inputstate.actionButton)
             {
                 body2d.velocity = new Vector2(transform.position.x < 0 ? forwardSpeed : 0, jumpSpeed);
             }
         }
     }
 }
 

 using UnityEngine;
 using System.Collections;
 
 public class InstantVelocity : MonoBehaviour {
 
     public Vector2 velocity = Vector2.zero;
 
     private Rigidbody2D body2d;
 
     void Awake()
     {
         body2d = GetComponent<Rigidbody2D>();
     }
 
     void FixedUpdate()
     {
         body2d.velocity = velocity;
     }
 }
 

 using UnityEngine;
 using System.Collections;
 
 public class InputState : MonoBehaviour {
 
     public bool actionButton;
     public bool standing;
     public float absVelX = 0f;
     public float absVelY = 0f;
     public float standingThreshold = 1;
 
     private Rigidbody2D body2d;
 
     void Awake ()
     {
         body2d = GetComponent<Rigidbody2D>();
     }
     
     void Update ()
     {
         actionButton = Input.anyKeyDown;
     }
     void FixedUpdate()
     {
         absVelX = System.Math.Abs(body2d.velocity.x);
         absVelY = System.Math.Abs(body2d.velocity.y);
         standing = absVelY <= standingThreshold;
     }
 }
 

I get that I either need to fix something in the inspector or I need to create a script which forces the player not to rotate, but I do not have enough of the syntax for it.