for everyone who says hey cannot play the game, you can, you just need java (doesn't matter about versions really, 1.5 and up works fine). however, the applet that wraps these games is poorly-written, so if you are having problems do this:
1) open task manager (windows) or activity manager (mac) and kill any java processes (shows up on my machine as "Java Applet - www.breumelhof.nl)
2) reload the page
3) when the game re-loads, click inside the game screen, and then puch "1" and "enter" to play

note, with any of these games, if the game is started, and you leave this page, or click on anything with your mouse, the applet will get screwed up and you will need to follow the steps above again to get things working correctly. good luck and have fun with these badass games from the golden age! peace