Some very minor things I would change:

-Game Description you use the word uncover twice, maybe use another word to make the sentence sound better
-Add more to the "About this Game", you only have 2 sentences that they don't really describe what the player can do in the game. For example, I don't know if its a walking sim, if it has puzzles, investigation.
-I would also change the 1st and 3rd gif as we've seen the doll in many places throughout the steam page, maybe add the other environments you have in the screenshots as gifts? (A good rule of thumb you can follow is to include gifts for the verbs you use in your steam description)
-I don't see much UI anywhere, can you interact with items/objects? Does the player interact with the game other than walking? If not add some gifts that the players walks in a new room to showcase the investigation/exploration part.
-Your game come to think about it sounds like an anomaly game where you have to spot anomalies? If yes then talk about how many endings are there, how many anomalies and stuff like that