Very easy. I completed the boss within 5 seconds. The trick is to make him jump and hit him while he's coming down. Arrows are useless on him. Good game, though.
I love the game references in this. All-around GREAT game. The second "racist" joke was hilarious. So is the second to last one. The last one made not much sense.
 "The Last Stand"){kind=icon}
 "The Last Stand 2"){kind=icon}
 "Boxhead: 2Play Rooms"){kind=icon}
 "Take Your Canvas Bags To The Supermarket."){kind=icon}
 "Another Small Favor"){kind=icon}
 "Straw Hat Samurai"){kind=icon}
 "Canabalt"){kind=icon}
 "Storm the House 3"){kind=icon}
 "Effing Hail"){kind=icon}
 "Streamline"){kind=icon}
 "Kamikaze Race"){kind=icon}
 "Vector Runner"){kind=icon}
 "Frantic 2"){kind=icon}
 "Silver Maze"){kind=icon}
 "ButtonHunt 2"){kind=icon}
 "This is the Only Level"){kind=icon}
 "Run"){kind=icon}
 "Falling Up"){kind=icon}
 "Adaptation"){kind=icon}