Cooperate with your allies to defeat the enemy approaching the base and protect the base from enemy attacks!
When the enemy invades the base, the base's physical strength decreases, and when the base's physical strength reaches 0, the game is over.
120 seconds later, endure until the ally's air force arrives, protect the base until the enemy withdraws,
Aim to clear the game!

Method of operation
-Swipe to move the viewpoint.
・Tap shot to fire a bullet.