This was truly an amazing and surprising experience, despite the game being short. While it was suggested that "something was wrong" from the very beginning, nothing was left obvious to the player and managed to deliever an interesting short lore and story, making a very good use of the "cute but actually dark" concept.
The gameplay was enjoyable as well and offers a decent challenge that is neither too unforgiving nor too easy. In other words, it's fairly balanced. However, while I managed to beat the game entirely, I would like to point out that, perhaps, it would be a good idea to adjust the hitboxes due to the amount of action that doesn't give enough time to worry about the player's hitbox. That could, however, be a design choice, which I will not judge.
The audio quality is pretty good, as well as the musics that, despite being only two, short tracks, can be heard for a while. In this category, my recommendation would be allowing the player to not only toggle the audio/music, but to adjust the volume as well, since I wanted to listen to the game, but the audio turned out too loud on my end.
Overall, I can easily give this game a 5 star rating for how it told a short and simple story that remained within the "Sacrifices must be made" theme and added a nice twist to the initially cute atmosphere of the game, alongside an entertaining gameplay.