I like the atmospheric nature of this piece. I only realized it was "happy birthday" at about 30 seconds in. XD You definitely added a unique and creative mood to the song, but perhaps I would've at least liked to see some more variation, since this piece was kind of really long for just being "Happy birthday" over some warm pads. Otherwise, it probably should've been 45 seconds and not 2+ minutes. "Goddammit Andrew, you're taking this way too seriously." --> There! I said it for you. ;)
Happy belated birthday, LN! ^^