Are you holding shift to run? By default, the player walks, which is slower than the enemies. Walk is useful for proceeding cautiously around corners though.
it is an interesting idea. The debris is the real problem and very hard to get around. And consider the game the other way around too. I want to kill all the sats in space with the least amount of shots. Could make the game more interesting
Check out the strategy guide, the game isn't so hard when you follow correct strategy. ;)