That wasn't very good.
Next time, try more complicated ideas. It would be a lot more interesting if a target would disappear, or become unhittable in any way (if that's even a word). Also, it would be interesting if you could send projectiles so that you have to shoot where the target is going to be. Maybe as something more interesting, you could turn the targets into babies or Teletubbies or something and have their blood and guts splatter everywhere whenever they're hit. (I'm sorry. I'm a cruel person and revel in the pain of babies and weird TV show characters.)
Anyway, my point is, this is just too simple. Sorry for being so hard on you.