itch.io

As far as I can tell, you collection can't do anything with the one exception being items that have the word "key" in them, which count as keys to open the exit door ("keylime pie" doesn't work for example, but "toy key" should)

Though if the girl remembers the item being put in your inventory they could mention or refer to it in some way, but I don't think they can actively look in your inventory.