What I would like to see for the upside down. Would be for you to have to complete a goal then enter a ramp that would divert the ball to a lock for the mode to start. The upside down world would start with changed color of lighting and an amazing light show. A new ball would kick out and timer start. So you have so much time to complete a different goal. If you lose the ball during this mode it wouldn't end your ball but go back to regular play and locked ball would then kick out. If you complete the goal then the locked ball would pop back out and game would go back to normal play.