I got some Puppet Combo vibes at first, really unnerving to be at that subway train. I ended up getting the bad ending because the door didnt open even after I interacted with it, I'm not sure if I missed something.
For the items you have to find: I think a few horror games made them glisten or have them glow without emitting light, that would make it easier to spot them and progress in the game.
Finally, for the cutscenes the first two static images of the subway platform could be shorter in duration, I found myself trying to walk and wondering if the game had frozen. For the cutscene inside the subway cart you could add a bit of text before the flickering intensifies to have the scene be a bit more dynamic until the gameplay begins.
I don't play many scary games but this one really got me in the edge of my seat, it felt like anything could jump at me at anytime!