Platform Mechanincs Player Movement Help

Hi, I have tried to add the mechanics of the player from the PlatformMechanics tutorial. I have copy and pasted while reading along and grasping all that I read. However it just crashes my game. So I have included the code, if you have a minute, please go over the code to see if you can find any errors because I am stumped.

edit:
as of 6.01pm friAug7th I edited this copy from Advice Tim's eagle eye. and it Loads now but no movement on the playerClass. I was expecting to see my player not animate, but move.

function playerClass::onLevelLoaded(%this, %scenegraph)
{
     $pGuy = %this;
      
      moveMap.bindCmd(keyboard, "left", "playerLeft();", "playerLeftStop();");
      moveMap.bindCmd(keyboard, "right", "playerRight();", "playerRightStop();");
      moveMap.bindCmd(keyboard, "space", "playerJump();", "");
	 
	  %this.setCollisionMaxIterations(2);
	  
	  %force = 20;
	  sceneWindow2D.mount($pGuy, "0 0", %force, true);

}


function playerClass::updateHorizontal(%this)
{
     if(%this.moveLeft)
     {
          %this.setLinearVelocityX(-60);
     }

     if(%this.moveRight)
     {
          %this.setLinearVelocityX(60);
     }

     if(!%this.moveLeft && !%this.moveRight)
     {
          %this.setLinearVelocityX(0);
     }
	 
	 if(!%this.airborne)
               %this.setLinearVelocityY(0);
}

function playerClass::updateVertical(%this)
{
     %yVelocity = %this.getLinearVelocityY();

     if(%this.airborne)
     {
          %this.setLinearVelocityY(0);
          %collision = %this.castCollision(0.005);

          if(%collision !$= "")
               %this.setLinearVelocityX(0);
     }

     %this.setLinearVelocityY(100);
     %collision = %this.castCollision(0.005);
     	
     if(%collision $= "")
     {
          %this.airborne = true;
          %this.setConstantForceY(100);
     }
     else if(%yVelocity < 0 && %this.airborne)
     {
          %this.setConstantForceY(100);
     }
     else
     {
          %this.airborne = false;
          %this.setConstantForceY(0);
     }

     %this.setLinearVelocityY(%yVelocity);
} 


function playerClass::updateMovement(%this)
{
     %this.updateHorizontal(); 
	 %this.updateVertical();

}


function playerJump()
{
     if(!$pGuy.airborne)
     {
          $pGuy.setLinearVelocityY(-225);
          $pGuy.airborne = true;
     }


      if(%this.airborne)
     {
          %this.setLinearVelocityY(0);
          %collision = %this.castCollision(0.005);

          if(%collision !$= "")
               %this.setLinearVelocityX(0);
     }
	 
	  if(%collision $= "")
     {
          %this.airborne = true;
          %this.setConstantForceY(100);
     }

  else if(%yVelocity < 0 && %this.airborne)
     {
          %this.setConstantForceY(100);
     }
	 
	 
}
	 

function PlatformerSceneGraph::onUpdateScene()
{
     if (isObject($pGuy))
          $pGuy.updateMovement();


   else
     {
          %this.airborne = false;
          %this.setConstantForceY(0);
     }
	 
}

thank you