Heed the warning from the red planet, Earthlings! The Martians are about to strike our beloved home to take our most valuable resource: cows! Protect Barney's "ladies" in this colorful and whimsical tower defense game! Use 20 machines ranging from the classic defense tower to the wild and wacky Helicowpter! Grab your Zapper and attack the Martians before they overpower your machines! And defeat over 20 quirky Martians like the Metalhead, the Mad Scientist, and the Ninja! The fate of Earth — and our supply of milk — are in your hands!