Oh yeah, I totally forgot about spacebar scrolling; actually a little surprised it never came up when I tested the game. preventDefault will definitely be implemented in the post-jam version, but I sort of messed up archiving my code (i.e. I didn't do it at all, really need to init a git repo for this project), so it will probably not make it into this version of the game.
Also, good catch changing the css using the console!