I liked this.
You did a great job with the colour palette/art. Everything was very clear despite the limitations.
I enjoyed that each of the cleaning techniques used a different minigame, and the on-screen instructions did make it clear how to do each one (I would definitely not have guessed them successfully).
Conceit and story of the game was fun, and I loved the art of the ghost. It's a shame that there's no ending scene with such a clearly defined end point/goal, but hey- my game is exactly the same on that, so I'm legally required to be ok with getting the same (lack of) outcome from yours.
Me and my 70 doubloons appreciate this entry for following all the rules and just being fairly solid all around.