I got #1, 2, 5, and 7 I believe (still a bit iffy on 5.) Most of the shots are pretty difficult--if you don't know right away what game it's from, you're going to have a hard time guessing. Except for #1. Everyone here should know #1. He mentions something about doing another contest after the PC version comes out.
Please refrain from posting answers in the comments. Have fun!
Giveaway: Free copies of Braid (Xbox 360)
[Official Braid blog]