Play Angry Birds with a USB slingshot

An anonymous reader writes: If you're sick of playing Angry Birds, or don't like touchscreen controls, there is now an alternative if you don't mind some construction. mbed have posted full instructions and a parts list for creating your very own USB slingshot, adding a physical element to playing the game. You need a decent branch for the slingshot, a microcontroller, USB connector, accelerometer, and a rubber stretch sensor. The C++ code is provided, and as a weekend project I can see this being pretty satisfying to create.