Now, I know for $10, we're not getting Halo or Half-Life. So, if it's shallow and repetitive, I can understand. But how are the controls, missions, and are you getting your money's worth with it? I am curious to check it out, and though $10 ain't a lot, I don't even want to bother shuffling space on my system to make room for it if it's not fun. Played it? Give me the skinny on it please.