On topic: I don't know if I have the patience to finish off this game. That guy on the video was amazing! I always rage at this game, but manage to say "one more time" until I finally beat the level... Then I can't quit once I get on that much of a roll!
I think i'm kind of the same way, either i don't play it at all, or i finish it in one playthrough.
So, i think i started playing the game yesterday, and beat it in about 4+ hours? Maybe 5+ wasn't really paying attention.
6-5 was the most grueling level in the game.