Boss #6You fight this boss on the 20th level after the level "The 3rd Kind". Unlike the other bosses you have to fight your way all the way to this one, which will take as long as any of the other levels. Once you get to the boss it's more or less a piece of cake. Just strum along to attack it and then destroy the enemies it launches at you. If you get your strumming right you will take it out in 3 attacks.
Click here for tips on beating the next boss.