I love the mood you created and the pixel shader you used! The tasks alone would have made for a good game, but I especially love that you added the angry ghosts that chase after the player—such a nice extra touch!
I really appreciate that you included a tutorial for the game; it was definitely needed.
However, I have one small comment about the dialogue: when the text fills the textbox completely, it disappears rather quickly to make way for new text. My reading speed, for example, is quite slow due to my dyslexia, so I missed some dialogue. I would suggest that, when the textbox is full, the player should need to press a key to continue the dialogue.
But I really loved your game!