public void Update(float dt)
{
for (int i = 0; i < Decorations.Count; i++)
{
GImage decoration = Decorations[i];
if (decoration.UserObject.ToString() == "ball")
{
decoration.SetVelocityY(-1f);
}
else if (decoration.UserObject.ToString() == "dead")
{
Decorations.RemoveAt(i);
}
decoration.Step(dt);
}
}