I believe this needs to be updated for the Leap Motion SDK 0.7.7 because I can't find the files needed from the SDK. The only files I could find in the SDK were LeapPython.so, libLeap.so, and libLeapJava.so. As a result, when I run Fruit_Ninja.pde, I don't see anything displayed on-screen, and the cursor is changed to a crosshair until I close the program.