This looks promising. Beautiful graphics, and a well-developed sense of pacing. I enjoyed the opening scenes of the unfolding mystery.
Unfortunately, the game ends before the action really begins. There really isn't much gameplay per se, so it's hard to judge this as a Metroidvania in particular.
Also--for a story-based game like this, with tons of written dialog, you simply cannot use a font like this:
RR
Reading this is like doing a Cryptoquote. I zeroed in on the short words and then, by process of elimination, figured out which letter was "E" (the most common), etc. Do not do this to your players! :D