To get the count of your game launch first make a LocalPreferences class and write following

public class LocalPreferencees{
	Preferences prefs;

	public LocalPreferencees() {
		prefs = Gdx.app.getPreferences("GAMECOUNT");		 
		}

     public void setCount (int count) {
		prefs.putInteger("COUNT",count);
		prefs.flush();
	}

	public int getCount() {
		return prefs.getInteger("COUNT",0);
	}
	}


then in your create() method write following

 @Override
    public void create() {

        LocalPreferences preferences=new LocalPreferences();

       //this will get your game launch count
        int count=preferences.getCount();

        //now set the count
        prferences.setCount(count+1);

    }  


So each time when your game launches you will get the launchCount .