Could see this getting old for some people really quickly, really well designed, the music for the first 15(?) levels was really soothing and relaxing. When more opponents were added and the black faction made its appearance the music really hit the mark adding more suspense. AI is really good, but still beatable. However, the slider is really awkward and I barely used it other then "5" and "0." Other than that it was a solid 2h spent.