Beautiful game!
I did need a clue here and there, but could solve most of it on my own (I don't like it though that unlocking hints requires extra payment). The compass slide-puzzle was rather frustrating and tiresome until I figured out the goal… but the other puzzles weren't so, and the automatic photos of hints in this game series is an awesome feature. I also love the little details such as the lighthouse being lit and rotating in all scenes where I can see it :)