Thank you for playing and your feedback!
As for the theme, "Built to Scale", I took a more figurative approach. The idea was to reflect the main character's growth from a minimal state to a complete being. The player's capacity to experience the world also scales up when you collect different body parts through both gameplay mechanics and sensory feedback (the eyes and the ears).
The story was meant to be ambiguous to a degree. It is about a girl who has lost parts of her inner self due to a traumatic event. As the player, you help her recover from this trauma. The miasma represents the feelings and memories tied to the event. Gaining the heart symbolizes courage, allowing her to face what once scared her. At the end, the player not following her signifies that the girl has gained the strength to fend for herself.
I hope this helps clarify the concept and the direction I aimed for. I am not much of a story writer, but I hope that you still enjoyed it. Thank you again for playing!