I actually have a "Criticism" about the BGM from a Musical Standpoint. *cue flames*
First of all, the overall experience of the game itself was okay, though I knew what was coming and was still disappointed & sad

That said, it was a nice little visual tale.
Regarding the music, however, I must gripe about ONE thing. And PLEASE forgive me here, but I am a musician myself and must use musical terms to explain my incompatibility with the Lullaby Theme. (I also address the creator in 2nd person, so forgive me for that.)
It is probably mostly due to my classical influences, but I could not focus on the story itself as much as I would have liked because of the apparent, blaring voice-leading issues that I could hear between the lower (bass) and upper (melody) voices. I heard parallels of perfect intervals at crucial points of the phrase structure, and specifically after the half-cadence and at the final authentic cadence of the entire loop-phrase.
At the half-cadence, there was what seemed like a climb in both the bass AND the melody on the scale degrees 1, 2 and 3, leading back to the consequent of the phrase. Now, if you had just used a form of parallel 10ths, it would have worked just fantastically. Even a chromatic line would have served better than a sudden jarring sound of three successive octaves in parallel motion.
At the final authentic cadence, for some reason you decided to have both the melody and the bass to move in octaves on the scale degrees 1-7-1, in a neighbor motion. There are two issues with this: 1.) For the penultimate functional Dominant harmony of a phrase, it must be in root position, unless you are specifically trying to move away from tonal functionality as a whole - for which the chord progressions used in the prior portion of the phrase do not account. 2.) The parallel motion in octaves once again creates a rather jarring contrast from the rest of the music up until that point, which from the rhetoric that I can infer from the piece is not what you seem to want to convey.
Thus, what ended up happening was that you drew sudden attention to the cadences of your phrase, but did not allocate enough strength nor emphasis to them in the proper manner. Hence, those parts kept distracting me, away from the atmosphere and story of the visual tale.
Of course, if you did incorporate such contrapuntal movements with a specific purpose in mind, then I have no real defense and would love to hear your reasoning for making such choices. Otherwise, I suspect that they were either passive choices (aka By Ear) or simple oversights.
Thanks for reading this rather anomalous expounding of my thoughts, and please, I am welcome to additional thoughts about the piece, especially analytical ones.
P.S. To the creator: if you do have the original score, I would love to see it - it might clear up a lot of things for me
