Hi there, I enjoyed the game quite a lot. I've always been a fan of the pixel art style type of games so I was curious to give it a try.
It certainly does tell a story about a serial killer, and at some points I even forgot that, that was the games premise as I was so focused on what was being told not only by the main character on screen but the environment as well.
If your goal was to challenge the relationship between player and protagonist as you've stated, I think you definitely hit your mark here.
All in all it was an enjoyable game that tells a short but very unique story, I'll be sure to look into your other work as well and I look forward to any future creations you make.
Cheers!