Ninja Defender is an action game about protecting your home. Ugly, dangerous monsters are marching towards the place behind you, and your only weapon is a sharp ninja star.
Choose your controls first, for phone or computer. Then throw your ninja star at the monsters to destroy them. The twist is that the star always flies back to you, and you have to catch it before you can throw again. If you fail to catch it, you lose one of your three lives. Keep throwing, keep catching, and defeat every monster before they reach your home.