Very nice. Nice look and nice sounds. I made a 4x4 square, and the snake just circled for the longest time. Then it broke through. How does the breakthrough logic work? score 3600 :)
The snake breaks through if it cannot find a path to the player. Perhaps it got stuck with it's tail on the other side or smth and decided to do that? One other person did report it breaking through without reason, so it might've been a bug