Gotta say, I love the little robot faces. The game as a whole reminds me of those "Key master" skill-tester machines (although nowhere near as rigged). If you were going to add more to it, perhaps some kind of rough center point / crosshair / "sweet spot indicator" down the bottom to help line up the shot? Either that, or my aim is just trash.
Best score so far was 1140. Not great, but eh. While I'm here, love the little splash screen! I gotta learn how to do that eventually...