The pain....
...in my fingers, I was addicted to this thing for 3 hours, and I could still be going if I hadn't decided eating was more important.
At any rate, your graphics only got a 7 because it was very difficult to see some of the later enemies. That may be the point but hunting around for the last camoflauged guy is kind of annoying. However, this didn't have very often so GREAT overall!