Not strictly a game, but we'd welcome any feedback:http://www.zapfab.com
The home page has a catalog of customizable 3D designs (bowls, boxes, bangles, etc). Select any of the designs to view or customize, and you should see it in a JOGL-powered 3D Viewing/Customizing applet. You can customize size and shape, color and pattern (depending on the design).
You can save the customized design back into the database; comment on, tag and rate the designs, and order them to be 'printed' on our 3D printers. Using the 3D printers, we can make you a real, physical object based on your chosen design (it's like watching magic!)
We'd welcome any feedback on the JOGL, the Java applet, or the site itself (but particularly on the JOGL)