/// <summary>
/// Updates the control elements of the game (updates all game objects -SolarSystemManager, fights,
/// groups and controlled movements).
/// </summary>
/// <param name="delay">The delay between last two frames.</param>
public void Update(float delay)
{
solarSystemMgr.Update(delay);
fightMgr.Update(delay);
groupMgr.Update(delay);
moveMgr.Update();
}