Even though it's a years old project, the graphics/style still holds up.
Things that need work are the pacing and the way some Events are executed, they often happen to abruptly and thus go into more of a funny way instead of being scary. The neck twist and falling down for example.
It is also not really obvious what's important to look at and what's not, and why some things are interactable and others are not (that would also save some work). But telling the Story through Flashbacks and the Mannequins is not new, but it does work, if it's going to be more fleshed out and all the W's are going to be answered.
The atmosphere is good but the cuts to the cozy rooms are fast aswell, it goes from mildly scary, to not scary at all, neckcrack next scene and so on.
So that's a point that would need a lot of work, if you go ahead and try to make it a full release. In terms of Puzzles it's alright, full version could be more complex, more ways for the Players to make errors, instead of changing one thing (color-coded puzzles, different objects to attach etc.) or just click the use button.
Good Luck for the future!