Hi! First LD, although with a bit more restricted time scope. Toolage:

• linux
• sfxr for audio
• gimp or graphics gale (http://www.humanbalance.net/gale/us/, using wine) for pixels
• vim or emacs editor (depending on mood)
• haskell (http://www.haskell.org/platform/) as programming language, with haste backend for targeting html5/js canvas (https://github.com/valderman/haste-compiler)
• I share my in-progress library for haste canvas bindings, feel free to use: https://github.com/robinp/haste-html5 (see https://github.com/robinp/haste-html5/blob/master/html5-test/Main.hs for quickstart).

Best luck for everyone!