Interesting side note is Jack made the game for the js13kGames competition (and won). The entire codebase is less than 13kb compressed.

He won last year with http://spacepi.clay.io

Impressive!

Doesn't seem to work in Chrome 29, works great in Firefox 24. (OSX 10.8.5)

Great game. I'm always excited to see polished <canvas> games.

And the browser is able to display an Asteroids (1979) game!

Well, that was fun! :-)

fun game really!