still with max brightness on my monitor, i couldn’t see parts of the mansion which were not illuminated, making exploring the manor way more difficult, and although the tutorial set clear my objective, i couldn’t find the artifacts. if they’re hidden under some sort of puzzle, like one commenter mentioned below, please consider adding some sort of highlight to interactable objects to make them distinct from other elements, and to avoid them been accidentally ignored supposing they just serve as decoration.
other than this, i see that you put a lot of effort into this project – congrats on making the game :)