So I decided to go through all the PSN demos (about eight of them) that I've downloaded but never played, and Rochard turned out to be the last one I fired up.
What a genuinely fantastic little game this is! The play mechanics are pretty unique, the graphics are solid, the music has a cool '80s epic movie feel to it, the story line is decent, and the pace of the game flow is absolutely perfect. The developer did a nice job blending an action title with physics-based puzzle solving, and I found myself thinking that this was the kind of fun I wish I had with Portal 2.
At least give the demo a try; maybe you'll plop down $10 for the full unlock after finishing it like I did. I don't think I've been surprised as much by any other game this gen.