Tied the demo and found the story to be interesting and gave it a go. My Big Sister is an adventure game with thriller theme throughout. There is no jump scares but it is the mood that it sets. You will be doing some light puzzles along with some exploration that are broken to different stages.
When I played the demo it left a cliff hanger and was wanting to know more. Unfortunately the game lost the plot after where the demo ends and reason for the game is kinda silly.
The game loop can be repetitive and you can stumble to figure it out with a low difficulty ceiling.
The game took about 3 hours to finish and being so short I also found what it offered to be the right length.