Hi Nen,
Sorry for my previous answer, I get confused between my two games -_-'...
This game does have some things left unsolved, like many horror games ;-)
But the different CGs you unlock gives you clues about this ^^.
If you made it all the way through (i.e. got home), then you've discovered pretty much everything I put in the game (depending on how many times you went through the nightmare).
I'm glad you like the game and want to know more :-)
Thank you,
Azephir