Sorry, but I've pretty much been wandering in here for an hour. I have no idea what to do next. I've just entered the room with the rotating staircase, and I've spun it around a few times, and explored all the areas it lets me, but I can't progress.. I found a door needing a key, but alas, I am without a key. (just like my OoT water temple experience) please help.

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"Six chambers. One bullet. 17% chance of taking your life."

go to the bottom of the red door and you will find a chest with A key in it

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Bye Guys!!!