Galaxy Defense Lite
You must use special towers and skills to fight against a lot of enemies. And you may need to choose your own tactics to shield these ways.
Features:
-3 difficulty modes
-6 unique towers to purchase and upgrade
-5 upgrade levels for each tower
-5 powerful special skills
-30 various kinds of enemies
-10 different bosses
-Drag to move the map
-Zoom in or out the map
-1 maps in total
-1 built in large maps