As a crafty little puzzle game by Two Lives Left, Cargo-Bot's premise is simple: program a robotic crane to rearrange crates so they look like the arrangement at the top of the screen. The method by which you do so is similar to our old favorite Light-Bot 2.0: drag and drop instructions on and off the four command bars on the left until you've got something good, then hit the play button at the bottom to see how she runs. The clever and brainteasing puzzles, adorably minimalistic soundtrack, and clear yet non-distracting graphics are more than worth the price of admission alone (it'd have to be, the app is free), but what really makes Cargo-Bot special is that it's the first game ever to hit the App Store that bears the distinction of having been created entirely on an iPad using Codea.