Loved the artwork and the concept of venturing through the dark, talking to NPCs and fighting enemies - the artifact collection was very satisfying as was the light activation. I do wish the key strokes were more organic - it was a little unnatural to remember that artifacts were collected with 'R' and backpack was '4' and chatting was 'C' (I might not be getting all of those right). I wonder how you might be able to implement 'overflow' more with some real sense of urgency or adding some heaviness or hard decision-making/morally dilemma-inducing narrative puzzles, since your idea is 'emotional overflow'!
~ Ananya N.