I could not find a way to change the graphics quality, so things got a little slow after while. But that didn't matter since the hole in the wall spewing death upon human civilization became a hole in the wall spewing scrap metal for you to collect without mental effort. I literally zoned out and started thinking about my studies while playing this game and it didn't affect my performance in this game. It's all just pointing your big gun at the hole while walking back and forth collecting metal.