Up to the 10th floor, every floor is like a big earth where monsters and climbers live together. However, after the 10th floor, only the 50th, 60th, and the 99th floors are said to be the ones where climbers can live.
Apart from those floors, every other floor is kind of like the tutorial floor. The difference is that on the tutorial floor, only a single climber can clear it, but here people can enter as a group.
Nevertheless, the more people there are, the fewer the rewards individuals can receive. Despite that, people choose to enter as a group since they don't want to die early.
The time difference between outside the floor and inside the floor, although different, isn't as huge as the tutorial floor, where one can stay for years, but only an hour would pass outside.
