I'm in!
This is my 4th time (I believe) trying to join LD, never was able to finish, mostly because I lose so much time setuping my stuff, but this time I'm quite early and I'm already experimenting on that front to be ready for the event.
My weapon of choice will be JS, mostly because I hate having to download an executable to try a game, but also because I love to have theses kinds of constraints.
I haven't chosen any librairies yet, I hope that I will be able to find one I enjoy before the event (any suggestion?). I would love some vector graphics, that was something I quite enjoyed in Flash, but from my previous search, that doesn't seems to be something really accessible currently in JS.
I hope to be able to include multiplayers functionnalities in the game in some form (either local or online), but that's just another constraint I'm adding to myself.