Loved the game, I have a few things to note regarding graphical weirdness.
It is possible for the expression bubbles to become placed in the wrong location if you start the interaction with plant lady and move.
It is possible for the expression bubble from the highest ghost to become frozen on the screen after interacting.
If you fall out of the ghost finding area, any ghosts you have found will respawn, this however seems to only re-trigger their dialogue if approached and not cause any issues with counting.
Hopefully this helps in any further patching. :)