Ha, loved it.
I really hope you can keep these up. I love BioShock and it's just hard to find a good parody flash out there.
The visuals were nice along with the animation. The only suggestion I can make for that is to lower the amounts of tweens used and bring forth some frame by frame for fluency. But even if you don't it will still look good.
The atmosphere was great, it really suited the BioShock status. It furthermore outlined the change in the Big Daddy in regards to personality. I love it how you made it so middle-class.
Good stuff, looking forward to the other 4.