space.addSpaceItem(ship1);
space.addSpaceItem(ship2);
// Add observers that show ships energy levels
so1 = new ShipObserver(unitx, unity, ship1);
so2 = new ShipObserver(unitx, bounds.height - unity, ship2);
space.addSpaceItem(so1);
space.addSpaceItem(so2);
// Send all keystrokes to the KeyInterpreter object