I’m currently in the process of touring the globe (I’ve given four talks in two cities, have two talks in two cities left) but I dug up something that should prove to be a lot of fun.
Will Larson has gone about revising the classic Tower Defense genre, porting it to the open web using Processing.js. The port is pretty basic still – but it definitely offers a lot of promise (and is a ton of fun to play, to boot!).
Will has been a machine – writing tons of demos and articles on Processing.js. Feel free to read through them to get a better feel for what you can do with the library.
Update: After a minor hiccup the game is working again (there was some problems with mouse input). Thanks Will!