This game is cool but sorely lacking in challenge (score: 28885 with all level 4 red turrets)! It's a little too easy I think. Then polish would be interesting.
Defend The Base
Defend your base using attack turrets, each with a different energy cost, and with different damage and firing time, so be careful with your choice.
The enemies change as the waves advance.
When you remove a turret you only recover 1 energy point.
Use the mouse to play, click on the yellow squares to place a turret or remove, buttons 1, 2, 3, 4 select the turret to be placed, have fun.