NINJA DEFENSE

Commander, you have received a message from the Sun-like Emperor himself! Scouts reported that unknown invaders had invaded through the northern borders of Japan. All the samurai forces are devoted to suppressing the rebellious southerners, and there is no need to send noble warriors to protect the barbarian northerners. This is a job for you and your ninja clan, hold off the enemies for enough time until we figure out how to deal with them.

This is a tower defense game. You need to create a battle line that can not be overcome by foreign invaders. Arrange and upgrade towers and melee units, and create a flexible and dynamic defense system. The money earned from enemies can be spent on new towers and upgrades, and stars for completing a level will go to permanent improvements in the game.