http://gamejolt.com/games/DefenderofEarthvsTheAlienArmada/269927

I will have a demo up soon.

Defender of Earth, is an exciting space themed tower defense game created by indie game developer Monkey Wrench Studio Inc. Defender of Earth vs The Alien Armada showcases 3 alien races the Varookuzan, Malkillva, and the Greys that you will do battle with in three quadrants of of our solar system. Each of the three races has up to 4-5 different ships that you will engage in 16 theaters of war including a final battle royal level..The game features 8 different towers that you can upgrade and super weapons that you can upgrade to in the Tech Tree.