Description: Your house is attacked by stranger enemies. Protect your house now! You use your mathematic abilities to answer the questions. With a correct answer, you can destroy an enemy. You need to kill enemies as fast as possible. The difficulty is more increasing in each level. And you will meet new enemies in high levels. To unlock the next day, you have to destroy an enemy wave.
Instructions:Type the number keys on your keyboard and then press Enter to answer the question.