Dark Parables: The Little Mermaid and the Purple Tide [Collector's Edition]
This is Dark Parables #8, which enters a new phase in the series, switching the reigns to developer Eipix. Though it retains the series formula and tone, it features a newer, smoother, more animated game engine, a change of style, and a somewhat shorter game length. Also, the story is simpler than previous entries, which is actually refreshing considering that they had become quite convoluted.
Despite the changes, if you've been a fan until this game then I am sure you would enjoy this one, too. And you know what to expect: a fairy tale cocktail with excellent drawings and a point-and-click adventure that is mostly about collecting various kinds of keys while solving puzzles.
Also note that these are hidden-fragment games rather than classic hidden-object games.