Really nice story for the game! A very interesting read. The story felt well thought out and perfectly described within just a few phrases. The colour change around the player also added a really nice touch to the game's theme.
One small thing I noticed was that sometimes the tilemap has lines flashing in between. I don't know if it was on purpose(Which is also a nice detail considering the game's theme nonetheless), but I think creating a sprite atlas can fix it. (Don't take my words as advices since I am a new developer) However, the detail added a really nice addition to the atmosphere.
Great job!