The intro to this game is definitely an attention-grabber, and the feel is unique and interesting. The difficulty level seems extremely high out of the gate, which makes it hard to learn the controls (two or three shots and you're dead, and you start with a quick shotgun blast to the face). I love the concept. Agree with Toasted that a health gauge would be nice, plus more health or a level layout for the first level that gives you a chance to get more familiar with the controls. But, as an ultra-hard game it has some fun challenge to it that makes the player feel determined to beat the level they are on!