A short horror game that delivers a dark satanic vibe, there is potential for this story to go far deeper to uncover the origins of the book and why your grandfather was so obsessed with this particular book... maybe you could be transported inside the book or maybe show flashbacks of the cursed book being created.
The English is a little broken but it may not be the creators native language but this can be ironed out if the game continued to develop. The scares are great and unexpected and the atmosphere is nice and gives off a sense of tension.
Overall a great short horror, it will be interesting to see what this creator does in the future. The game is the first one on my compilation of 3 short scary games.