I'm all for artisitcs but,
I understand the style you're trying to get at, I'm not worried about the graphics being non human, but the animations are still choppy which is never good, if you smooth up that fbf the whole thing would look miles better. Secondly I thouhgt it was fairly short, and I realize a demo but with this length it's more like a teaser. One thing that kinda pissed me off was the key, why does everyone make keys look like that? (lol?) Hah, I know it's not anything big but every game uses keys like that and who in real life ACTUALLY DOES? LOL. In something non-serious it's kinda fitting cause that's an iconic key but since I've got a large feeling this isn't supposed to be funny or like light action, I'd change small details like that. For gameplay it's meh, choose your own adventures can be good and can be bad, always try to have a mix between the obvious answer being right and the not so obvious, but please dont make it random give hints in the scene which will kill you and which won't. I donno guess thats all I gotta say. I'll give you a six outta ten but probobly rate your full one a 7-10.