hi I am going throught the game rn and got stuck. I wentured to 40th floor then back to 37 and went through all the research. Got into portal to fifth level wen't to the bridge area and then I got tped back. I tried again and same thing happened. I did not kill the dragon yet. Am I supposed to? I thought killing dragon leads to bad end where demons are freed so I avoided killing him. What am I supposed to do now? I am doing 0tp run for my first playthrough.