Tower Defense: Turrets Lite

This version of the game is lite (only the first two missions are available).

The game belongs to the genre of Tower Defense.
Goal of the game: retention attacking enemy.
There are many types of turrets with different properties. Almost all of them have 10 levels. You can change the priority for each of the turret (nearest,weakest or strongest target). Scrupulously considered balance between turrets and difficult balance of the waves.
To perform difficult missions, you need to have a good tactical and strategic abilities, and the ability to make quick decisions and adapt to changing conditions.