This is a really interesting concept. Reminds me a bit of that Tetris-with-physics game in that it takes an old concept and twists it. At first I had a lot of trouble playing, but I got better at it pretty quickly. My high score still sucks because I'm not that good at Snake, though.
I like the minimalist black-and-white graphics more than I thought I would; I've been looking at a lot of old Macintosh software recently and it has that look to it.
You mentioned that this is your first game released; how many unreleased ones? I'm curious, but you don't have to answer that one if you don't want to.