/// <summary>
/// Updates the Danmaku controlled by the controller instance.
/// </summary>
/// <param name="danmaku">the bullet to update.</param>
/// <param name="dt">the change in time since the last update</param>
public void Update(Danmaku danmaku, float dt)
{
if (danmaku.frames > frames)
{
danmaku.DeactivateImmediate();
}
}