Princess Isabella
A hidden-object classic, with lush, gorgeous graphics, excellent hidden object scenes, and fun puzzles. The story is a derivative cliché, but it's lovingly presented, with delightful voice acting and animations.
The only problem is that the low resolution makes it hard, sometimes, to identify objects sometimes in hidden-object scenes. Also, it's rather short. But that's petty criticism: fans of hidden-object games would love this one!