a relatively okay level, but entities exist so yeah.

while you enter the level, note that the main hall is littered with objects or resources such as almond water, so stop there for a while and grab some supplies for survival.

you may find elevator shafts around level 5, you may go to any floor, EXCEPT 13 and higher. those who enter higher than 12 will suddenly disappear without a trace and it is unknown what happens when you do; but expect the worst. note that going to different floors result in the same area of level 5, but you will be transported to a different place in level 5 that contains an elevator. you can use this as an advantage for getting away from entities, just make sure you close the doors in time.

you're either gonna wanna go through the boiler room yourself, or get help from an colony like m.e.g's house keeping post on level 5 to guide your way. once you get to the boiler room, find an arcade cabinet and boot it up; if done correctly, you should be transported into level 40. level 40 is a fairly safe level and you will be given access to even safer levels.

if you really don't want to go to level 40, that's fine. you can also go to level 6 by travelling deep and far into the boiler room, you should be careful while adventuring into the boiler room; as it gets warmer and the heat can be extreme.