http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=292035008&mt=8 First off, I love these kinds of puzzles. I recommend trying it you like puzzles, or are just up for a challenge. For those of you that bought it: How the (explicit) do you beat level 10? There are more than 80 levels and they, for some reason, decided to put a really tough one in the beginning. The puzzles after it are no where near as challenging.