I really enjoyed the graphics on this entry. The game world is conveyed well and keeps you where you need to be heading. The snow was especially cool.
Audio was good (The cutoff from blinking at a page in the first level is particularly neat.) but sometimes feels a bit empty with no footsteps and just the wind loop.
The font could be something a bit less... whimsical? It just felt like it didn't fit the style.
The challenge comes more from the sanity not refilling over time than any individual threat, which is fine though doesn't take much strategy until the last level where there is a better variety of hazards.
The puzzles don't tell the player much which made them feel nicer to solve.
Only other point to note is that when interacting with a keypad I didn't know the code for, I pressed escape to leave only to have my game close and have to play up to that point again.
Overall a very solid entry for the jam, good work!