Bitsbox App: Shoot the Alien

Shoot-The-Alien.js

//Lower number means need to be accurate and is harder
explodeDistance = 50
//Lower number means moves faster and is harder
howFastDoesUFOMove = 450
fill('nightsky')
//You can name a variable whatever you want
bob = stamp('rocket2', 375, 900)
ufo = stamp('ufo2', 37, 120)
shot1 = shotInit()
shot2 = shotInit()
shot3 = shotInit()
shot2.rotate('northwest')
shot3.rotate('northeast')
//Sounds have issues on Android http://bit.ly/1y86Rf7
song('forces', 20)

function tap() {
    bob.move(x, y, 500)
    ufo.move(random(768), 200, howFastDoesUFOMove)
}

function shoot() {
    shotStart(shot1)
    shotStart(shot2)
    shotStart(shot3)
    shot1.move(bob.x, -100, 1000)
    shot2.move('northwest', 1000, 1000)
    shot3.move('northeast', 1000, 1000)
}

function shotInit() {
    shot = stamp('rayshot')
    shot.hide()
    return shot
}

function shotStart(shot) {
    shot.show()
    shot.move(bob.x, bob.y)
}

function loop() {
    d1 = distance(ufo, shot1)
    d2 = distance(ufo, shot2)
    d3 = distance(ufo, shot3)
    if (d1 < explodeDistance || d2 < explodeDistance || d3 < explodeDistance) {
        ufo.explode()
        silence()
        sound('nuke', 30)
        text('YOU WIN', 300, 800, 'white')
        song('brothers', 30)
    }
}

bob.tap = shoot