I thought they said 'We come in peace'!

God save the earth... Alien robots have invaded and are attacking you... Who doesn't like sci-fi action arcade style shooting games? Here is a tip for new beginners... don't buy the bullet upgrade untill you have 4000 dollars so you can upgrade it all the way. Buy the health and rotation speed upgrades first... The first bullet upgrade is glitched and you can't fire your weapon... But when you upgrade all the way you shoot wide lazers automatically, really funny. By the time I was on the 9th wave I was bored... I had bought all the upgrades and everything.