void GameLayer::resetGame(void) {
    _score = 0;
    _energy = 100;
    
    //reset timers and "speeds"
    _meteorInterval = 2.5;
    _meteorTimer = _meteorInterval * 0.99f;
    _meteorSpeed = 10;//in seconds to reach ground
    _healthInterval = 20;
    _healthTimer = 0;
    _healthSpeed = 15;//in seconds to reach ground
    
    _difficultyInterval = 60;
    _difficultyTimer = 0;
    
    _running = true;
    
    //reset labels
    _energyDisplay->setString(std::to_string((int) _energy) + "%");
    _scoreDisplay->setString(std::to_string((int) _score));
}

void GameLayer::stopGame() {
    
    _running = false;
    
    //stop all actions currently running
    int i;
    int count = (int) _fallingObjects.size();
    
    for (i = count-1; i >= 0; i--) {
        auto sprite = _fallingObjects...