My brother was able to solve it semi quickly and I wanted to mention what he said here.

He stated "start from the opposite corner of the corner with the most unmoving squares and work towards it"

Hope this helps

I am requesting that "haunted halls: green hills sanitarium" be a game to be speedrun-able. I don't request it be done quick I only request it be done before 2027 but after October 2026. the game is of similarity to "mystery case files: 13th skull" being a computer game of the hidden objects variety.