I was mind blown by this entry. Idk if it was intentional, but this game is like a metaphor for some many society issues, like segregation, cults, war, people just slowly but surely create a group who believe the same and that group try to convert others to grow. People constantly in conflict because of differences of opinion. You have to literally segregate people to win the game (divide and win). The more power a group has, the harder they can hit the minorities. Also, I felt I was playing one of those visual examples that you can see in documentaries or ted talks about society or psychology, which is cool. If you can flesh this out and polish it, it would be incredible.
I understood how it works pretty quickly. The only problems that I found was that the collisions were a bit buggy, but I imagine it was not easy to program for a game like this. Also, I would like the feature to erase the walls to work like a normal eraser like in Paint, a button to erase all the line at once would be useful too. Also, the game didn't feel like it was getting harder, and it was a bit repetitive. The concept was the time that kept me playing for like 30 minutes. maybe you should lean a bit more in the stragety part and add more variable, but idk.