Here http://www.ticonblu.it/thesystem you can play a game Pino and myself developed in JavaScript + CSS3 for “modern” browsers i.e. HTML5.
Works fine on the iPad, and its ideal when played by several human players. The game design is not mine, comes from a board game, and the porting / transformation is not complete yet, but checking this game could be a practical way of learning the basics of game prototyping using very simple JavaScript.
This game is particularly simple as it is turn-based; now I’m creating a very simple JavaScript framework for real time games – will publish that too soon.