Space Legends: At the Edge of the Universe
Though this is a casual point-and-click adventure, it's actually quite challenging. The puzzles and even hidden-object scenes will require you to think methodically and logically. Some reviewers commented that the challenges are obtuse, but I believe you can crack all of them by paying attention to detail. And if you get stuck, there's always the handy hint button.
The world is vibrant and exciting, brought to life through excellent graphics. It's rare to find a good science fiction hidden-object games, and this one is actually not purely an adventure in space: it mixes in medieval tech through a twist in the story (no spoilers!). I think it's managed very well.
Unfortunately, the story is not well fleshed out and the characters are very one-dimensional, all leading up to an abrupt ending. But, despite this deficiency, I'm sure fans of hidden-object game will enjoy this one, especially if they are up for a challenge.