Graphics are pleasant. View from the balcony is certainly nice.
I was stuck with 9 stones and couldn't find the black one. Thanks to the walk through comments, the last stone is hidden at the bottom of rocks where the hot tub is located.
It took me quite some time before I could unlock a grey box. One has to realise that there is space between numbers on a mirror and translate the numbers with a clue from a MP3 player. c: