[See that growing smile right now? I think someone got the right answer!]

That is correct! There are multiple ways to solve this puzzle such as turning two switches on, but turning one off sooner than the other. However, the answer is same in the end.

[And 30 picarats for the young lad here! He's scribbling down the amount next to Sora's name now.]

Very well done, my boy. You have earned a nice amount of picarats as well on your first try.