This game uses Java for creating a window, drawing the graphics, playing the sound, and handling input, but it’s written in Python! This is possible thanks to Jython. Download at: http://tylergriffin.me/JythonGame.jar . I also ported this game to PyGame (a cPython wrapper for SDL). You can get that version at: http://tylergriffin.me/game.html .
i like your explanation about collision-detecting on your page.
placed it into my favourite-bar 
Thanks! I wrote that in hopes that it would help people out. It’s good to hear that you found it useful.