This game f*king rocks! Have no other words to express how I felt about it. Exploring the last, most secret rooms of the museum made me feel such a broad array of emotions, from sadness and grief to overwhelming joy and happiness. And the place as a whole is just so good at conveying emotions and feelings, it's amazing. And while quite a few of them are very heavy and sometimes downright depressing, the game never ceases to be fun and amusing and curious in its design, so even after going through "the bad stuff" you feel strangely uplifted. And the way each memory and emotion is conveyed through text, music, character designs, and architecture is just so inventive and smart!
The two most powerful moments stick to my mind (careful, spoilers ahead): the almost endless descent into the deepest chamber of the museum and the secret "dev room". They both are kind of on the opposite sides of the emotional spectrum to me, but both are exceptionally good at conveying what they have to convey.
Overall, a true achievement in the art of conveying human emotions through pixels, music, text, and interactions. Great stuff!