Something I noticed.

When Lilya and Andrej were at the arcade,carnival,amusement park, whatever. There was this electric chair game called "the original shocker electric chair." Which makes the handles vibrate to give the feeling of an electric shock. Anyway Andrej picks her up and puts her in it. I think this is symbolizing Andrej killing Lilya. She thinks her new life is going to be all fun/wonderful, but in reality he's giving her a new life filled with misery, sadness, and in the end, death.