Art and Sound Design is great as always!
My only complaint is on the second level; idk how I managed to finish that.
Essentially you're supposed to look out for the disguised spirits; problem is, I don't know what the good ones look like. I think that you're supposed to get that info in the first level but you don't really have much time to memorize even a smidgeon of details plus there's barely any of the "good spirits" themselves.
Tbf I think that can be solved by simply introducing all possible good ghosts in the first area or maybe a small poster that shows what good spirits look like or just even a standard -- "good spirits have no horns" -- or something like that. Just so it doesn't look like a trial and error, though at that point that might be just a personal preference HAHA.
I'd say due to the second area the difficulty spikes were weird esp since the 3rd level was quite fun actually, though also a lot easier and manageable. Maybe have the first and second area mechanics for the third one? HAHA That's what I was expecting.
There's some bugs I think. Music stops sometimes and the game continues even after a game over.
It's a nice short game; I just hoped the mechanics were better introduced if not explained.