Save Scratch Cat from the evil blue Scratch Cat! Drag red or black ninjas from the red boxes. You can only buy the black ninja for two times and the red ninja for three times. You can only put the ninjas in the green place. Both of them costs 10 points. When your score is more than 50, you win. If your health reaches 0, you lose. You could buy ninjas during the game.
thanks for my tutor for giving me the idea and help fix the wrong codes.
