this is my second game. i know my first game hardly even started yet. oh, well this is what my game is going to be about

you are a child, you have no parents, but then you get adopted by a ninja trainer aka sensei. This is set in a ninja world, so thier won't be any cars or any type of tecnollogy, its kind of like naruto. But the story is different, itstead of ninja's fighting ninja war, the ninja's fight aliens. here is a description of the aliens: they have wierd looking machines, which shoot out iron. but they look just like the ninja's. any ideas on what the aliens are?