Maze Torus Gyocha

Path finding game in Maze Torus. Black lines disappear if Grey line set intersects and appear if Grey line set doesn't intersect. If all Black lines disappear, then all Grey lines disappear. Blank Black square becomes a block. (Black lines cannot cross)
Goal.
Remove Grey lines in all Black squares.
Features.
1. One button to start (in the bottom left corner) - Click anytime to start new.
2. Eight buttons for menu - Select level.
3. Two buttons for directions - up-left and up-right.