I found this game to just be mediocre. It was pretty much just a bunch of random shootings. It's pretty easy to make a gorilla joke like that. I mean, they are pronounced the same way! I thought the graphics looked a bit dated. It's still nice to see those enemies.
I didn't even know I had to use the WASD part. I don't think that was part of the game. It was pretty unpredictable. I thought you would just advance on your own. The arrow keys should have been more clear.