This game plays greatly with my personal feelings and fears, so that's why I prolly enjoyed it this much.

On the one hand, Knock-Knock is a bit buggy and confusing project, where the gameplay gets boring rather fast to make the player drop it.

On the other hand, this game has some real unusual atmosphere and attractivness, which may hold you till the very end, despite the mentioned boring gameplay.

Guess you need to be in some kind of special mood to enjoy this game fully. I dunno.