sweet retro atmosphere
My complaints would be the single unchanging landscape, and the frustrating aim system. The aiming is much too rigid, and since I couldn't see a cross hair with the mouse pointer blending in, it was doubly difficult to tell where I would be shooting next whilst constantly moving about.
Yet the music was great (I don't like christmas music, but I won't lower points based on that personal notion,) the graphics were fun and flashy, the upgrade system was nifty, and I enjoyed the concept of protecting an area so you may continue receiving bonus weapons. Great over all :)