first of all, thanks for playing. the second - yes, I took this model from free models, because this is a short 10-minutes experience, where I just played with player's imagination and tense of horror, so it would be crazy for me to make the entire 2-floor house from scratch, just for 10 minutes game, as I always make my games alone. third - I usually make all environments in my games myself, but only if the game is big enough, which is NOT related to this certain game (because as I said before, its not actually a "game", just a short experience) so making such big house for such small free experience is crazy, when you are making the entire game alone.