The first thing that struck me about MicroBot -- a top-down Xbox Live Arcade and PlayStation Network shooter from EA and Naked Sky Entertainment -- was the impressive graphics engine, a proprietary solution from the dev team. Sure, you're controlling a MicroBot on a 2D plane, but depth of field trickery shows off various happenings in the body in the forefront and background, giving the environment a grander scale despite its 2D perspective. And the game's procedurally created world assures that no two playthroughs of any environment will be identical.
The second thing that struck me was the game's sense of momentum. As a robot floating around inside a human body, careening in any particular direction too fast could result in an accidental death. It also gives the environment a more dangerous presence. Our worry? Who knows what happens to a human when robot parts are left to scatter throughout the internal organs.