The artwork, atmosphere and music in this game are all brilliant. It's more like an interactive linear story than a proper game to me and, like you said, very short, but I still enjoyed it very much! The whole story/plot is a mystery to me and I'm not sure what is going on in this game, but it added to the intrigue. Hopefully things will become clearer in later chapters.
All in all, the artwork and atmosphere kept me glued to the screen. Great job! Looking forward to seeing more of this :)