What each level is? I'm afraid that is impossible, however I can tell you about the main 9. Level 0 is the OG level, yellow walls and wet moist carpet. Level 1 is a warehouse with concrete floors, level 2 is some sort of maze filled with pipes, level 3 is an electrical station, level 4 is like an office, level 5 is like a luxury hotel, level 6 is just pure darkness, level 7 is just flooded, level 8 is a long cave, level 9 is a suburban city.