Bird.cpp
- Bird::jump() : if statement removed, because when bird goes over the top, game ends

Game.cpp
- Game::mainLoop() : Temporarily prints “bird is dead” instead of updating until isCollision() method is fully functional for testing purposes
- Game::isBirdAlive() : Method is now complete. If bird goes over the screen, below the screen, or collides with pipes, the game ends

Score.h
- Changed public variable Score::deleteHighScore() to jut deleteHighScore() so the game compiles on Mac