I guess I won't reiterate most of what was said, one that I haven't checked if anyone said is that I feel the part where they are trapped, indoors and in the shadow would warrant a big downturn in the song, I felt that was missing based on the description of how you interpreted the theme, but otherwise it was a nice listen, some more work on the mix, maybe consider adding the darkness part at the end and I would call it a day xD Good job!