Borderline Defense is the final project of the java AG 2012 from the OKEN Gymnasium.
The java AG is a little student project group by Benjamin Rottler and myself.
Most of the code and all of the graphics were created by the students. They settled on the idea of creating a space invaders clone with a few unique features.
Because we didn't wanted to get too much into optimizations and smaller problems we use my pre-existing game engine absCanvas.
Borderline Defense shows it strengths in: