The source for my version is in the file Mine.java. It was compiled with JDK 1.2.2 and uses both "swing" components and the "new" (1.1) event delegation model. It may not run on every browser. In fact, it may require a fairly new browser. It works with Netscape Navigator version 4.61 and Microsoft Internet Explorer 5.00.2919.6307, but I am not sure about any other browsers.
If the application doesn't come up at all, you will probably need the Java Plug-in. This is available (free) from Sun at http://java.sun.com/j2se/1.4.1/download.html. Click on the appropriate download link under the "JRE" column. This will get you to the correct place.
By the way, it not only works on Unix (Solaris CDE 1.2), but it looks the same; just like the windows version!
Anyhow, here it is: