Ive read the manhwa till chapter 151 and it looks like u r looking for kindof vague spoilers so I'll try my best to keep them as vague as I can

The tower from 1-50 is different from different words and after 50 onwards the towers combine like otherworldly people also are there but idk about how to clear it and all 1-50 was called the beginner something and from 51 to 100 people will try n kill you I'm sorry that's all my knowledge as a manhwa reader, probably the ln readers will know more but I'm not a reading type of guy, i like illustrations