The visuals are really nice, I like it a lot! I wish it was animated but I know it’s a game jam and a one-person job so congrats on that!
I think it misses some simple audio effects and a little zen type music to fill the atmosphere of your narrative. I also noticed that the difficulty wasn’t increasing very much, I was at 200 points but the pattern and frequency of ghosts were still the same to me so it was a bit boring at some point. Maybe you could reinforce the “survival” aspect of your game by increasing the scaling of difficulty exponentially so that the high score becomes more interesting for players!
Overall, great game, keep it up! :)