Hm... Well Idea and art are great(scene animation too), not so much with other things.
1st is walking animations, they look real weird for main hero at least(though by the end of demo I stoped finding it so weird, got used to I guess, so not much of a problem in the end)
2nd are dialogues, while all of them are understandable, they look like a very good mtl because of mistakes and how they are phrased.
3rd is map of house, it's a labyrinth not because there are many rooms, but because by entering new location you don't always enter from the derection you walked in. As result it's hard to imagine layout.(explored the house again and it just confused me the first time with change of angles, the only exit which still feels wrong is the one leading outside from basement)
4th is art of the scene, it started with art of mc after he came, which shouldn't be like that?
5th are controls, starting controls aren't really comfortable, and lack of ability to change them is a minus.