I just finished this image and I thought I would show some earlier stages of the process.
I started with this idea of this woman emerging from the Tetris game and into our world.
She would be the personification of Tetris. 
I then wondered if there should be 3D blocks falling around her so I jumped into Maya and created this:
And then i thought maybe she should be walking on blocks like she was inside the game
But in the end I went with the original idea of a 2D-tetris game in the background :)
