Empress of the Deep
This game is very short, easy, and features very low res graphics. It's not a true hidden-object game: there only a handful of hidden-object scenes.
And yet I still recommend it. The story is nicely crafted and the world is engaging. It reminds me a bit of Riven (the Myst sequel). The puzzles are easy, but satisfying and pretty. I especially enjoyed the one in which you have to match star consetllations.
Don't pay a lot for this: but if you get it in a bundle, and enjoy simple and pleasant adventure games, then you won't be disappointed.