I'll start with what I liked. The game itself looks fantastic, the art-style is definitely a strong point here and the varying environments are interesting and at times highly detailed. Despite it being called a 'semi' horror themed game, it does have quite a few creepy and scary moments in it that really took me off guard, so I was pleasantly surprised in this regard. I could only piece together a bit of the story, however I did find it peculiar in a good way, and it definitely had my attention. Lastly I enjoyed a lot of the puzzles, however this trades blows with another point I'll be making later on.
Now I'll be going over a few things that I didn't like. At times the game felt needlessly difficult, I think this comes down to two things, character movement and checkpoints. The character felt clunky at times, the game requires the player to perform some extremely precise movements and given the way the character handles, this creates some difficulty, a key example of this is during the theater segment with the Yurei, jumping from the ladder to the platform seems simple enough but it took numerous attempts to perfect simply because of the way the character controls.
Let's talk checkpoints, I appreciate that the game has a checkpoint system, but there are times where things get very frustrating, going back to the theater segment with the Yurei, the player is required to set up the room in such a way that allows them to complete the puzzle and move on. However if the player dies (which they will, a lot) the room resets completely and they have to set it up again, I found that this wastes a lot of time and causes a ton of needless frustration.
I'm happy to report that I didn't run into any game breaking bugs or glitches throughout my playtime, however there is a minor thing I noticed really early on. When I entered the very first building I had the character close their eyes right before another character appeared on screen. This caused it so I couldn't get out of the action while they were talking, making it really difficult to read the text on the screen.
In conclusion this has the look and premise of a good game, but there are a few things that keep it from being excellent. It took me an hour and ten minutes to complete the demo, this isn't because the demo is particularly long, but rather because it's needlessly difficult. Looking past the difficulty and frustration I faced, the game is good, the art-style is excellent, the atmosphere and environments are dark and dreary, and match the tone of the game perfectly. It's an enjoyable, albeit frustrating experience at times.
I hope you don't mind but I made a let's play video of my time with the demo over on my channel.
Cheers and best of luck with further development.