Cargo-bot - game to teach programming

A friend just posted a link to an iPad game called Cargo-bot, which requires players to program robots with the right sequence of instructions to manipulate stacks of cargo crates.  It's free and looks like a great way to introduce basic programming and algorithms.

The app has been built using Codea and looks pretty slick.  Definitely worth a look if you have an iPad. Thanks to Nat Pryce for sharing the original link