How to create a complicated game over scenario ? HELP

I know it sounds stupid but I have looked every where and I can't find an answer. I have a ball and seven walls I want to go to my levels scene and I also want it so when the ball passes a certain point the level is completed so I added this script: function Update () { if(transform.position.y< -5) Application.LoadLevel("gameoverscene") }but it isn't working i also have a raycast that makes the ball move side to side to dodge the walls could that be messing it up? thanks in advance!