You keep well away from the circle at the center of the floor, and begin to climb. The stone steps feel solid beneath your feet, and the banister is smooth to run your hand along. The stairs follow a gentle curve, staying along the outer wall of the tower.
You continue climbing, up and up. Eventually you notice a bit of a slope in the steps. They're higher along the edge near the wall, and lower towards the center of the tower. The steps still feel steady though, you feel no risk of slipping, so you continue on.
The slope in the stairs continues to increase, and you find yourself confused as to how you still feel so secure in your footing. The banister is still solidly between you and the open center of the tower, though you notice that you're increasingly able to look down at the spiral down to the initial open floor.
Eventually you realize, gravity no longer seems to be behaving as it aught to. Each step still feels as if it's flat, your weight evenly distributed between your feet, but what you are sure was just "down" is very much just.. to your left. In fact, you see that the staircase itself seems to stop just ahead, and in front of you is open.. wall? It must be wall.
You step out onto this section of wall as if it were floor, as it is clearly intended to be. You've found yourself in a lounge of some kind, with small groupings of chairs and coffee tables separated by a few feet of walkway. Looking ahead, and above, you realize that the ring of the tower wall all behaves as if it were floor, and that these little relaxing spaces continue around the whole way.
To your right you can see a ..ceiling? What looks like a wall, punctuated with many arched doorways at intervals. Each door has a label above it.
What do you do next?
I'm going back downstairs, hoping gravity will work properly when I get there