The game 2048 is an incredibly addictive time-sink and has spread like wildfire over the internet over the past couple of weeks.
If you'd like the pictures to be a surprise, read no further - just play. Otherwise, there are spoilers below.
At first glance, it looks impossible to play, but it only took me a couple of goes to remember the picture values. There's a cheat sheet below which might help.
Unfortunately, the game ends once the (amazing) 2048 picture has been reached.
It only lacks a more interesting background - my own fault for neglecting to add one. Gah!
UPDATE JUNE 2014:
I've only just noticed UsVsTh3m have a Tetris game using some of the same source images.