Level 2: Mario level. Jumping and hitting your head to avoid silverfish. Also, if you wanna try this again, bring: torches, sword is fine, diamond pickaxe if you want since you find those in chests, an axe to shear the walls in level 0, and of course food. Try again without cheating. Also, there is an achievement when you escape: You Never Truly Left" because you are just in level 4 of the backrooms. Level 5, 6, 7, and you are NOT in the overworld. You can find portals too. Whem you do this again, Try to complete every achievement.