Click anywhere to shoot, and space for shield. It can get hit five times before the shield is out. If they reach the planet and there is no shield, it is game over.
Background: https://lh3.googleusercontent.com/K3UdS0t311DpKIiq614Ix6cRanFYxueEFaLF3T0bPQLGcJtqzw5ps3ClI85nK7jB4ElbKBs8xg=s640-h400-e365 Font: http://www.1001freefonts.com/rounded-fonts.php All else by me. ;)
