When I saw the first part of this, I knew it was going to be cool. I expected it to be like in Madness Combat. Dang, that series has just become so popular that's all people compare NG series to, isn't it? Anyway, it's nice to have such good animation. The ending is what made it worthwhile. I thought he was really going to die.
You pulled a twist that I did not see coming at all. I doubted those other guys would kill him. You came up with some unique enemies on the first 49 floors. I was expecting a bit more gore (again, like in MC) but this works too. The best part is, once more, the payoff at the end.