I got this on the Switch on sale, and I love it. I must be missing things, because the beach puzzles are real stumpers.
They do get a bit tough! Swapping character order with the shoulder buttons is important, and for at least one of them you need to have unlocked a certain number of ghost allies for the protagonist.
I might make some video walkthroughs one of these days... There's also no shame in switching to Easy mode for a puzzle or two if needed!