Survival difficulty classes

Class habitable: a place that is perfect for living in

Class 0: a safe level but not that suitable for living in

Class 1: a level with danger lurking but still fairly safe

Class 2: you will be on the run most of the time but it is still safe mostly

Class 3: there is normally a lot of entities or very dangerous entities so you will have to run away for most of the time spent in levels with this class

Class 4: this is the point where you should avoid levels with this class because there is tons of entities and dangers

Class 5: these levels will lower your sanity swiftly and have more entities/dangerous stuff

Class DEADZONE: there is no way to live here

Class ?: for levels where it is not decided what class it should be

Class (insert number/word here)?: same as class ? but if someone is more certain of the levels class

Class various: the difficulty depends on the person and stuff like that

Class completely safe: a lie told by tricksters to lore you to dangerous levels so only listen to class 0