I enjoyed the progression of difficulty as you expanded the rooms, giving more to look through. It was satisfying to turn around and spot the item. I think having the palette shader helped with the aesthetics as well as making things a little more difficult to find, so nice accessibility feature to turn it off.
I may be wrong, but it felt like more items appeared in the old rooms as the rooms expanded, and I think I would have rather they always been there and I just needed to click them now. I could be misremembering though. The interior models were especially strong. Nice work!