All credit to the original author here – I’m only sharing screenshots of their work (with links to the original) because this is exactly the sort of incredibly useful information that just ups and vanishes without warning.
S = Floor start position (there is only one way to enter each floor)
! = event or object (some event locations need to be returned to on multiple occasions to progress)
Arrows = Stairs going in the relevant direction
Square = Umm… other events, I think? (Non-essential maybe?)
Monster = Battle
Key = Locked door. Some doors are permanently locked on one side but not the other. The only locked doors that can be unlocked are in 1F’s kitchen (00,14) with the basement key item and the basement door at (10,03) after viewing the event at (07,07) – (answer “Cohen” when asked).
Have no idea what this game is but would like to find out more? Head over here – click!