Thanks - I thought it came out quite well. It's not been in the Advent Calendar, but to be fair I suspect it might be because it is using a non-documented feature of PICO-8 (to make it wide screen) and that makes it a little problematic to run outside the html wrapper I hacked for it.
I also only barely sneaked it out in time for the 25th when I first wrote it. I don't mind, I enjoyed making it, it gets some interest each year and people seem to enjoy playing it :)