That looks very nice, good work. You've got a nice eerie feeling going there.
Too bad some of the outdoor assets from the game, like the bushes, are of such low quality... I think those were only meant to be seen from afar. Your castle looked a bit small too, is that a 2 bedroom castle?
Yeah, it's true that the few outdoor assets of the game are of a bad quality but by adding lights, fog and some effects you can get some nice outdoor landscapes.
Maybe it's not quite clear in the video, but I can assure you that the castle is huge, especially when you go inside. I made some very large maps and the player will have to travell outside to visit various parts of the castle.