A WebGL version of Star Trail is now up and running. After setting up all projects the right way in Eclipse it would finally let me compile a fresh HTML 5 edition of my app. It took some time to make the app fit in properly on the website but in the end jQuery made my day.
Then I ran into another problem when trying to play the game as both the game and the browser received keyboard input events. This was solved by preventing the default actions of all browser navigation keys when the game was in focus. The result is an app that actually runs faster than the java applet.
Most modern browsers support WebGL, however, if you use Internet Explorer you must install a plugin like Google Chrome Frame or IEWebGL.
Check out the new version right here!