zillajr, you seem to be forgetting that this guy can traverse a level filled with spike traps, soldiers, spinning ninjas, and electricity beams in TWELVE SECONDS. Also he has a robot arm.
bartie22, defeating the black shadow is optional and being beaten won't lower your chances of winning. And it's pretty likely that you'll be beaten the first time. If he beats you, your stats go back to 1, but you will be able to gain them much faster the next day.
Icarusvet, you're wrong. There is no achievement for staying alive for 300 seconds. There is an achievement for staying alive for 30 seconds, and an achievement called "This is Sparta" for hitting point 3 and then point 0.
the main menu is the plaza from Half-Life 2, the main character is like the Hunter from Left 4 Dead, and his invisibility is like the Spy from Team Fortress 2, all of which are games by Valve.