First things first, this game is very polished, and actually, there is not much to add or change about it, in my opinion.
You could consider binding the USE and SKIP DIALOGUE button to the same key because there really isn't any reason why they should be different keys at the moment. You are only able to do one of the two things, so it would never conflict with itself. If you were to do that, it would also be very easy to use a more common control theme like pressing E for interactions. You could also add dedicated audio sliders for SFX and music, but there is really no need to do so. At the current state, there is not really a point in allowing the player to move diagonally, so you could either remove that ability to hide the lack of a diagonal walking animation without affecting gameplay, or you could add animations for that, of course. The overall tone and atmosphere of the game are very well crafted, and although I am really not a huge fan of games like this, I enjoyed this short little game. Very well done, good job!