Start out by selecting the which ninja you would like to play as and then Sensei Wu will tell you that a village is being attacked by the Hynobrai tribe. You will then go into the forest with the ninja you selected and begin to fight the snakes that tunnel up from the ground and drop from the trees. Use Z to strike with your weapon and X to jump. Pick up the coins that drop as they will power up your special move that you can hit with the spacebar. Save the village and good luck ninja!