I love the atmosphere and story! I also love how the font used in the story at beginning and end looks like that of DOS games.
I would like to give some constructive feedback about the controls: while the graphics and atmosphere are great, the controls are a bit annoying.
Why do you need to switch to "move" mode at all to click an arrow? Imho no matter what "mode" you're in, clicking the arrow is pretty obvious that you want to move.
There is inconsistency with the controls too, making it even worse! Some books put you in "move" mode and require move to exit, other books instead don't require a mode and have a simple exit button. Then, some doors show they're locked with "d", others show they're locked with "s". And then some things like the fireplace do "move" but still require the "d" action. It's so confusing sometimes ;p
I think the controls can be improved as follows:
-eliminate the "move" mode entirely. Instead, clicking any arrow/door/... moves you no matter what "mode"
-have an "automatic" mode, the one that is now the cursor without symbol that does nothing I suppose, in automatic mode, it "action" if it has action, "see" if it has no action, or force "see" if you hold shift for example.
-or alternatively, have no modes at all, just make regular click to move/see, and shift+click/right click (or long click on mobile devices but please not on pc) to do action, or vice versa. Or something like that. Anything that prevents unnecessary mode switching.
Maybe look at how Monkey Island did the controls :)