Hey I'm glad you're enjoying it :) This is a kind of a big moment in the story so without spoiling it I can say I wrote a lot of snoopy little bits of flavour text, and all the hints or outright solutions are in there. Any time you're stuck, try snooping more. You don't need to backtrack unless you want to hunt easter eggs; everything you need to advance is on the relevant floor. I hope this helps, if you're still stuck let me know and I'll hint harder.