Stage 3 Enemies are made and tested.

Video

Source code is at http://apcs.mathorama.com/index.php?n=Main.SimpleGameTutorial and the game is at http://www.mathorama.com/ChickenLittle.html

If you missed Stage 1, you can get it at http://www.youtube.com/watch?v=u459QHRepC8 or https://archive.org/details/GameAppletStage1.

Stage 2 can be found at https://archive.org/details/GameAppletStage2