If it's always a game, I will just ask for infinite questions first or at least one question per day. There's no saying that you're only limited to only one question.
If it's a request, maybe it doesn't count for a question, unless it's an inquiring manner. I'll just be making a statement, like, "I want infinite wishes or one question per day."
it also depends on if there's a waiting time for the answer, or i can just wait for eternity until i asked my first question.
I can just try to urge the entity by giving out interesting statements to scoop out information. Beings like that probably just want some amusement first. and whoever can entertain them will get more benefits.
Let's assume you can only ask one question.
I guess the most important question comes with "Why." understanding their intention to force people into survival games may be the key to clear it, but I don't think they will answer that.
Even if I request them to answer honestly, they can just refuse to answer.
The next thing, if I hadn't known them already, is knowing the rules and mechanics of the game itself. If you know them, you can find a way to play around it to your advantage.
If I had known the rules, probably will just ask for advice on getting the most out of this game. As the developer, they probably knows something the others don't, and they're probably be glad to give their insights.
If I already knew these two, I will probably ask about myself and how the being sees my potential. It may be a great help since in these scenarios, the most important thing may be my own strength, and knowing about it can greatly improve myself.
Else about the other survivors in detail to know your friends or enemy and / or the worlds.
Ain't that much important things to ask, to be honest.