Well, I thought a little bit and I probably won’t have time to learn everything I need to go through ludum dare with HTML5. I’m still on the very basics (with a good tutorial, btw: http://active.tutsplus.com/tutorials/html5/learn-html5-with-this-simple-avoider-game-tutorial/). So I’m probably doing it with Java and all the other stuff I already said. Good luck and have fun!