Ronny only let's you to travel to fun zone or locks.
Did you notice the counterweight?
It opens up the selectors. Select from those, musically. Just like Ronny likes it.
The counterweight is no good. Maybe if you would have an item designed for playing these kind of things.
Like a mallet. You can find one from the locks (on the down alley). Change the counterweight with the mallet and you can control the elevator.