Bruno senses that his new house feels very sad and gloomy, giving him the impression that happiness and laughter are missing from the environment. He feels that the place lacks joy and anything worth celebrating, which makes him uncomfortable and curious about what is wrong.
He notices an atmosphere of emptiness and despair, believing that there is no reason to smile or be happy in his new surroundings. This perception influences his feelings and thoughts, highlighting a sense of unease and confusion about the space he now inhabits.