Anyone who got an idea on how to do this?
I shared my game here; http://www.greenfoot.org/scenarios/10980
public void nextLevel2()
{
if (getWorld().getObjects(Diamond.class).isEmpty() && canSee(Keyhole.class))
{
Mollenworld2 mw2 = new Mollenworld2();
Counter mw1counter = (Counter)getWorld().getObjects(Counter.class).get(0);
Counter mw2counter = (Counter)mw2.getObjects(Counter.class).get(0);
mw2counter.setValue(mw1counter.getValue());
Greenfoot.setWorld(mw2);
}
}