This was a background commissioned for the game, "Demonless." It should pop up on the iPhone app store soonish. It's a Puyo-Puyo game.
This was soooooo much fun to make. Come on, a tower of bones! I totally enjoyed making this one. This is actually a modified version of what'll be in the game; the one in the game has a sky that I used some tricks and shortcuts to make. This one is pure PA, since I know lots of people on here don't dig it otherwise.
EDIT: Since you wanted to see it, here's the non-PA sky: