The world is filled with freaky monsters. Protect the base and destroy them all.
Your base is under attack from some seriously weird monsters. Blast them to smithereens before they can reach the portal using your collection of defense towers, each with their own special abilities.
Click and drag the screen with your mouse or use the WASD or arrow keys to look around. Zoom in and out using the mouse wheel or the + and - keys. Use the mouse to build your towers. Defeat each wave!