The new shaders from 1.4 are way better. I loved the new aesthetic and the way you used light and dark on her. The only issue I have with it is how the keys now glow.
One thing I think would be cool to see is the shadow of your character. Since you would always be seeing your own shadow when you walk past a window, the moments where her shadow appears to show she is behind your back would be creppier. Some audio cue for that like sudden breathing sound or a quiet laugh would probably add to the creepyness of those moments as well.
I'm curious to see what other features you will implement in the future, and if there will be more interactivity in the scenario with the new puzzles you want to add.