For such minimalist graphics and sounds, this story was delivered in a very clever and effective way! I didn't think much of it as first but it ended up gripping me and taking me all the way to the end.
Biggest problem I have with this one is that the doors have a pretty similar color and tone with the walls, when you first look at a game you don't exactly know what things are supposed to look like so it's best to be clear; unless you only want them to notice something later.
And the dialogue is a bit stilted, but that might be more to do with your translator doing a 1-1 with both languages, it rarely works; to do it right they have to do some writing too.
It IS great that the scps are getting more attention though; I never believed they would go anything beyond the stories. Can't wait to see what you do next!
Ok, now i understand what wrong with doors.
I have similar feedback before, but not understood problems with doors.
I send you PM when will changed door appearance in next update, and you will says better it or not (now i develop other game).
About dialogue - i just didn't pay attention to it, that's all. And yes, translator just doing 1-1.
In next game i try did dialogues better.
Pretty good it only needs an alternate ending and for file 3 to be an easter egg of sorts.