Your task in this fun ninja game is to explore levels as a number and solve mathematical equations. You must solve the equation in each level by adding or subtracting numbers in the right order. To help you, you have shurikens made up of four different mathematical functions. Find the correct shurikens and defeat other number ninjas in order to find correct solution. The equation turns green when it is solved. Don't hit any spikes or other painful objects. Use ARROW KEYS to move around. Press "Z" KEY to zoom and "X" KEY to throw weapon. Good luck!