关于Cocos2d-x中根据分数增加游戏难度的方法

//level提升所需的分数
enum LevelUp_Score
{
Level1Up_Score = 5,
Level2Up_Score = 10,
Level3Up_Score = 15,
Level4Up_Score = 20
};

//让生成的Baby实例对象不断地往左边移动，超出屏幕就消失，好像有了这个就不用再在Block和Star的定义下面写一个用来消失的update函数了
void Baby::update(float dt){
//log("wo zai baby update limian1");
m_score=GameScene::sharedGameLayer()->getScore();
//log("wo zai baby update limian2");
//m_score=GameScene::getScore();
//根据到达的分数，设置LEVEL
if (m_score > GameScene::LevelUp_Score::Level1Up_Score && m_score < GameScene::LevelUp_Score::Level2Up_Score)
{
//m_level = LEVEL2;
setPositionX(getPositionX() - 6);
}
else if (m_score > GameScene::LevelUp_Score::Level2Up_Score && m_score < GameScene::LevelUp_Score::Level3Up_Score)
{
//m_level = LEVEL3;
setPositionX(getPositionX() - 8);
}
else if (m_score > GameScene::LevelUp_Score::Level3Up_Score && m_score < GameScene::LevelUp_Score::Level4Up_Score)
{
//m_level = LEVEL4;
setPositionX(getPositionX() - 10);
}
else if (m_score > GameScene::LevelUp_Score::Level4Up_Score)
{
//m_level = LEVEL5;
setPositionX(getPositionX() - 12);
}
else
{
setPositionX(getPositionX() - 6);
//setPositionX(getPositionX() - 6);
}

if (getPositionX()<-this->getContentSize().width) {
unscheduleUpdate();
removeFromParent();
}
}