A prime example of what your demo should not be - no direction, no tasks, no hints, no explanation, bugged out interactions and so much more - just a beautiful mess.
Visually, stylistically - the game is great. The details in this are really intuitive, the NPC interactions, the house itself, but that's the end of the praise. The game has complete 0 direction - it doesn't explain how to interact with objects, when it does, the interactions are bugged out, when I pick-up soda cans I can go and take a shower with those cans and carry them with me through, I mean honestly, I highly encourage you to fix this fast.
Also, the plot is more or less similar to Disturbia (2007) movie.
Good luck.
Edit: Not going to rate this, because its a demo and I really do not want this to have a bad rating. At least giving a chance to fix and improve.