PlayN Video Poker
I did finish my NaGaDeMo game just in time for Google I/O. All and all it was really fun using PlayN. I love the fact that I can spend most of my time in desktop Java-land and have the other targets mostly just work.
Here are a couple screenshots of the game:
Check out the other NaGaDeMo games.
HTML5 Game Programming FAQ Day 1
Book Promotion at CodeRanch
Early Access version of Learning HTML5 Game Programming available
Alternative Languages with PlayN