Created files and connection for credit screen
Fixed storyboard conflicts
added the content for the credits, finished feature
Added alpha to the Music and SFX buttons so they look "off" when they are turned off.
Fixed levels 7, 8, 10, 12, 15, 20, 23, 24, 26, 29, 32
Added storyboard things and classes for PIDding Monsters prototype
Storyboard connections hooked up
Added constants, added turrets and PID and monster-spawning function
Turrets shoot stars now
Added collision detection. Lives are lost when you shoot green pipes now.
Added lives and score label, handles when monster gets to PID
Added NSExceptions to Grid Generators and

moved audio files to strings
Added logic for categories. Game prototype is done!
Let other mini-games have a chance to be played again.
Tweaked parameters of bounce mini game. I decided to keep the penalty for putting a bad ball in the good bucket the same as the penalty for putting a good ball in the bad bucket so the scoring system is easy for the player to understand.
Added sound effects for bounce, correct sort, and incorrect sort. Implemented the playing of the latter two sounds, but not bounce.
finished test cases
Merge pull request #60 from zsweedyk/feature-sound-buttons

Added alpha to the Music and SFX buttons so they look "off" when they ar...
Added instructions to the tilt and bounce mini game.
Added ten images for the bounce mini game's icons.