Game-of-Death is a project mainly written in JavaScript, it's free.
Game of Death made in canvas
Game of Death in HTML5 is an HTML5 port of "Game of Death Lava" by Vincent "Vulume" Goossens.
I release only the JS source of the demo, as you can easily deploy it to a page using HTML5 Boilerplate template by Paul Irish or you can just create a page with a div id="main" in it to host the game.