Maze Cube Yeolcha2

Path finding game in Maze Cube. Black cells are following in sequence. Grey cells turn White in the place of Black cells when no two Black cells are overlapped each other. And White/Grey cells disappear when the first leading Black cell overlaps the last Black cell.
Goal.
Clear all White/Grey cells.
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 - Clockwise and Counterclockwise.