cn-sensei-guides/02-yellow/05-02-zapper-pt-1.js

/**
A new application of the remove() function is presented. Instead of removing objects 
based on an x-coordinate condition, they’re removed on contact with another object.
*/

//*****************Beam Object: Update Every Frame Event***************************//
var spacePressed = isKeyPressed(Keys.space);
if(spacePressed) {
    $this.visible(true);
} else {
    $this.visible(false);
}

//*****************enemy Object: Update Every Frame Event***************************//
// remove base if enemy reaches base
if (!this.isTouching(base)) {
    moveBy($this);
} else {
    base.remove();
    beam.remove();
}
// remove enemy when hit with beam
if ($this.isTouching(beam) && beam.visible()) {
    $this.remove();
}