Well,

Since you made it in 10 days, I'll take it with a grain of salt. It wasn't too bad, don't get me wrong, the idea was alright, but the execution was lacking in terms of quality.

I would say you have to work more on building up tension, don't just put a scary guy whenever the player picks up a note or does something.

Maybe try and make something disturbing next time, because that's usually what works in this kind of short horror games.

Anyway, keep it up, and do yourself a favour and set a longer deadline next time. You might just make something really worthwhile. :)