Quoting Back to the Future II:
Marty McFly: [showing the two boys how to play the shoot 'em up video game] I'll show you, kid. I'm a crack shot at this.
[shoots a perfect score with the electronic gun]
Video Game Boy #1: You mean you have to use your hands?
Video Game Boy #2: That's like a baby's toy!
Well, this is not at all a baby's toy! That's the kind of projects I love: simple, and effective!
You can challenge yourself, measuring your reflexes, or play with a friend,
to see who is the fastest. You can build it and program it
using the material the author shares on his website.
REMEMBER! Guns are not toys at all. Play safe, play well, play with LEGO!