Challenge: Finish the project so that when the boss bat is struck by the ball - it reduces boss health. When the boss health reaches zero - you win the game! Extra challenge: Make the bat fight back! Create a projectile for the bat that randomly fires back at the cat and allow the player to move the cat up and down. Extra, extra challenge: Make the bat only be able to be hurt when its costume is a specific color. In other words, change the costume back and forth between invulnerable and vulnerable.