Some mechanical puzzle but not logical, rather reflex/timing game. Basically one has to time to lock the moving objects, the player sees the same all along.
So you say widgets are not a bad idea in this case.
One more thing - can I access to the transform locations of the elements of the widget?
I used to do something like “is below 45 but greater than 41” on my actors’ Y location. Can I do smething similar in widgets?