Spin the World

What a quirky game this is, not really sure what to make of it, but here goes. The idea behind this game is that the Mayan Prophecies of disasters in 2012 come true. The world is attacked by some kind of alien race that turns our planet into a cube. Who knows why, but then to add insult to injury they continue by sending wave after wave of strange monsters intent on our destruction; some of which, I must say, look suspiciously like purple sperm. Anyway, your mission is to keep the monsters at bay, and if you can do this for long enough, you might even be able to turn earth back to her beautiful spherical-self.