Fighting alien invasion with space battleships!
[Upgrading ship, tower, skill]
– Strengthening the ship can install more towers, and also you can strengthen the towers and skill
[Set the tower according to enemy characteristics]
– You must install different towers, depending on the characteristics of the enemy (Optics / Physics).
[Many missions are constantly updated!]
– You can choose the level (Easy, Normal, Hard) of the card according to its game process.
[Compete and survive against other users.]
-You can compete for the best rank with other users in survival mode!