Make Crawler head and movement direction different

Project/Assets/ML-Agents/Examples/Crawler/Scripts/CrawlerAgent.cs

         //avg body vel relative to cube
         sensor.AddObservation(m_OrientationCube.transform.InverseTransformDirection(avgVel));
         //vel goal relative to cube
-        goalSensor.GetSensor().AddObservation(m_OrientationCube.transform.InverseTransformDirection(velGoal));
+        goalSensor.GetSensor().AddObservation(cubeForward * TargetWalkingSpeed);
-        sensor.AddObservation(Quaternion.FromToRotation(body.forward, cubeForward));
+        sensor.AddObservation(Quaternion.FromToRotation(body.forward, Vector3.forward));
-        goalSensor.GetSensor().AddObservation(m_OrientationCube.transform.InverseTransformPoint(m_Target.transform.position));
+        goalSensor.GetSensor().AddObservation(Vector3.forward);
 
         RaycastHit hit;
         float maxRaycastDist = 10;
 
         // b. Rotation alignment with target direction.
         //This reward will approach 1 if it faces the target direction perfectly and approach zero as it deviates
-        var lookAtTargetReward = (Vector3.Dot(cubeForward, body.forward) + 1) * .5F;
+        var lookAtTargetReward = (Vector3.Dot(Vector3.forward, body.forward) + 1) * .5F;
 
         AddReward(matchSpeedReward * lookAtTargetReward);
     }