So, shuffling Spiky through the game, so far things we had to consult Help for:
obtaining the key to the attic door, because the puzzle is SO old and SO hoary that it's fallen completely out of favor by now and I'd forgotten that used to be a thing
obtaining the small copper key, because the particular mode of pushing someone into telling us things didn't quite occur to us, even though we had the relevant information and had puzzled at it
My memory of the game as a whole is shaky enough that I'm not capable of providing too many spoilers and can mostly help with puzzles honestly. I remember the ending (too well) and bits and pieces of the upcoming dangers but not enough to matter.