The game is nice and simple. I enjoy the controls and the UPP Cannon taking awhile to turn. Though the money gain is a little quick, you can get almost every upgrade instantly. I do wish the difficulty curve was a little better, it goes from nothing to insainity quite quick, though I do like the choas. Also I had issues with the cannon not fireing when I click. It seemed to get stuck trying to trun to where I click and never firing. Also the background music doesn't loop