Ki and Na are close friends, but opposite characters. When they get angry, Ki goes north, Na goes south. Ki turns left, Na will turn right. They have no chance to meet for reconciliation. They are angry in the game, we will be peacemakers. You are a wise conductor who will help Ki and Na meet at the target place, and hopefully everything will be fine. You control yellow one, the green one will react in opposite direction. When they meet at the place where the flag was, you win. When one of the two characters hit the wall, the other can move forward if possible. You will need this feature to adjust their positions, and to arrange them symmetrically around the target place, the prerequisite for victory. In Hard or Insane level, there are some enemies added. You have to give way to them, don't hit them. When you hit one of them, you loose.