Welcome to the party.
To run the app, go to Processing > implementation > GA_syde361, click on any of the .pdes there, and run in processing.
To get the sound to work, you will need to import a library not directly accessible from the Processing UI. Copy soundcipher from genetic_algorithm_syde361/libraries into your local ~/Processing/libraries folder.
You may also need to install controlp5 and themidibus, which can be found in Processing.