All right, so, I’ve managed to work out how to participate without a) unboxing and setting up my computer just for the compo, in the middle of a move, or b) leaving little software dev turds all over someone else’s computer, the solution being, use entirely portable (as in USB-stick portable) software for development. In this case, allinoneruby.exe, notepad++, mercurial (the command-line part only), pidgin (for irc), and whatever graphics software is already on this computer (such as MS paint, probably). This is made even more delightfully awkward by the fact that I normally do my work on a Mac desktop, and now I’m on a PC laptop. Should be awesome.
I should also add, in addition to my previously announced use of Ruby and Gosu, I may make use of chipmunk for physics, and I may steal some code out of an earlier project of mine, Operation Lambda. I anticipate using application-level code like menus, user preferences and resource management, not any gameplay code.
All that being said, this is still a busy weekend; nothing like 48 hours will be spent on this project.