This was a pretty intriguing experience as despite the demo being short, I felt that the game mechanics were quite interesting and the storyline definitely piques my curiosity as to what is about to occur as well. I found the idea of turning lights on and off, being able to sense the connection in the dark and the use of the shadow being the ominous character preventing the main character from moving forward is really cool.
I really liked the bloody, flesh-like texture being used in the game and I assume that the storyline will be the main push for the game as a whole. At the moment, I can't really suggest much in terms of improvements due to the length of the demo but I hope that the creator is able to construct an immersive storyline and make greater usage of imagery and visuals to emphasise the internal turmoil that the main character is facing when he enters the house. Moreover, I also recommend the usage of flashbacks if the storyline permits for it to occur.
Thank you for reading my comment and I wish you good luck in your future endeavours.