The concept really fits the theme of the jam. I love puzzles so this is up my alley. I liked the gameplay until I realized that districts didn't have to be connected and that makes it too easy. For a game made in a day it is pretty good. I didn't have anything playable in the first day so I'm impressed.
It doesn't have a tutorial so players who don't know what Gerrymandering is might not understand how to play. It isn't obvious that you can right click a district to reset. Also it isn't obvious how many block should be in a district so the beginning of a level can sometimes be surprising when that number goes up.
If you add more time, it would have been nice to have better graphics and user feedback.