Couldn't seem to start, which means either (a) I'm dense and not figuring out something basic, or (b) clicking the "start" button doesn't work in Firefox. (Are you supposed to click the "start" button? It doesn't work in Firefox.)
Ohhhhh, enter. I must've tried every other stupid key. :-) Thanks! Definitely fun once I got past that first really hard "how to start the game" puzzle!