So... Commenting on this game again, huh? Well then XD Anyways, I managed to find the song with a quick google search. Its called The Terminal, and the backstory to how the song was created influences about what I think about the game. The creator of the song had mentioned that he tried thinking about a looming terminal illness that can affect you. This makes me think that the boyfriend/family member died of a terminal illness and the girl was having difficulty coming to terms with it, and he gave her the memories of the times that they had together to make her happy again.
This is a beautiful game. Its short, but meaningful. as LittleHat said, the boy is trying to help her let go. Its like he's saying "I know, I'm dead, and you can't let go. But we've had good memories together, and its good to remember, but I won't rest until you are happy again." and like deathkknight said, the items represent the stages of life. This could mean that the boy is related to the girl, maybe the boy is her dad, because a father would experience the different stages of life with his son/daughter. I love the music too. Its a nice game altogether. Its about losing a loved one, being family or a person you loved a lot. But the guy loved the girl so much, he made her happy, with the good memories of him.
 "Grey"){kind=icon}
 "Alice is Dead - Ep 1"){kind=icon}
 "Interactive Buddy 2 (Prototype)"){kind=icon}
 "Innkeeper"){kind=icon}