What is the problem with my code? var gunLoaded = true; var enemiesMovingLeft = false; var gameStarted = false; var enemiesRemaining = 4; var startTime; var elapsedTime; var energy_boltX; var energy_b

What is the problem with my code?

var gunLoaded = true;

var enemiesMovingLeft = false;

var gameStarted = false;

var enemiesRemaining = 4;

var startTime;

var elapsedTime;

var energy_boltX;

var energy_boltY;

onEvent(“screen_game”, “keydown”, function(event) {

var shipX  = getXPosition(“image_ship”);

var shipY = getYPosition(“image_ship”);

var distance = 12;

if(event.key == “Up”);

{

shipY = shipY – distance;

}

if (event.key == “Down”);

{

shipY = shipY + distance;

}

if (event.key == “Enter”);

{

fire();

}

setPosition(“image_ship”, shipX, shipY);

verticalWrapAround (“image_ship”);

});

function verticalWrapAround(object)

{

var objectX = getXposition(object);

var objectY = getYposition(object);

var objectHeight = getProperty(object, “height”);

(if objectY < 0 – (objectHeight / 2));

{

objectY = 450 – (objectHeight / 2);

}

}

else if (object Y > 450 – objectHeight / 2);

{

objectY – 0 – (objectHeight / 2);

}

setPosition(objectX, objectY);

function fire()

if (gunLoaded) // gunLoaded == true;

gunLoaded = false;

var shipX = getXPosition(“image_ship”);

var shipY = getYPosition(“image_ship”);

var shipHeight = getProperty(“image_ship”, “height”);

var shipWidth = getProperty(“image_ship”, “width”);

var energyBoltHeight = getProperty(“image_energy”, “height”);

var energyBoltX = shipX + shipWidth;

var energyBoltY = shipY + (shipHeight / 2) – (energyBoltHeight / 2);

setPosition(“image_energy”, energyBoltX, energyBoltY);

onEvent(“button_start”, “click”, function(event) {

if(!gameStarted)

{

gameStarted = true;

setPosition (“button_start”,100, 500);

startTime = getTime();

setPosition(“image_energy”, 400, 100);

timedLoop(50, function() {

updateTime();

moveEnergyBolt();

});

moveEnemy(“image_enemy_one”);

moveEnemy(“image_enemy_two”);

moveEnemy(“image_enemy_three”);

moveEnemy(“image_enemy_four”);

collisionDetection(“image_enemy_one”);

collisionDetection(“image_enemy_two”);

collisionDetection(“image_enemy_three”);

collisionDetection(“image_enemy_four”);

}

});

function updateTime()

{

var currentTime = getTime();

elapsedTime = currentTime – startTime

elapsedTime = (elapsedTime / 1000).toFixed(1);

setNumber(“label_time”, elapsedTime);

}

function moveEnergyBolt()

{

var energy_boltX = getXPosition(“image_energy”);

var energy_boltY = getYPosition(“image_energy”);

var energyBoltSpeed = energyBoltX / 10;

energyBoltX = energyBoltX + energyBoltSpeed;

setPosition(“image_energy”, energyBoltX, enenrgyBoltY);

if(enegryBoltX > 800)

gunLoaded = true;

}

function moveEnemy(name)

{

var enemyX = getXposition(name);

var enemyY = getYPosition(name);

var minX = 103;

var maxX = 200;

var distanceFromMax = maxX – enemyX;

var verticalSpeed = (distanceFromMax / 9) + 20;

var horizontalSpeed = Math.min(elapsedTime / 2), 16);

enemyY = enemyY + verticalSpeed;

if (enemyX > maxX)

enemiesMovingLeft = true;

if(enemyX < minX)

enemiesMovingLeft = false;

if(enemiesMovingLeft) // enemiesMovingLeft == true

enemyX = enemyX – horizontalSpeed;

else

enemyX = enemyX + horizontalSpeed;

setPosition(name, enemyX, enemyY);

verticalWrapAround(name);

}

function collisionDetection(object)

var energy_boltX = getXPosition(“image_energy”);

var energy_boltY = getYPosition(“image_energy”);

var objectX = getXPosition(object);

var objectY = getYPosition(object);

var energy_bolt_width = getProperty(“image_energy”, “width”);

var energy_bolt_height = getProperty(“image_energy”, “height”);

var objectWidth = getProperty(object,”width”);

var objectHeight = getProperty(object, “height”);

if(energy_boltX + energy_bolt_width >= objectX && energy_boltX <= objectX + objectWidth)

if(energy_boltY + energy_bolt_height >= objectY && energy_boltY <= objectY + objectHeight)

if(!getProperty(object, “hidden”))

hideElement(object);

enemiesRemaining–; // enemiesRemaining = enemiesRemaining – 1

if(enemiesRemaining <= 0)

stopTimedLoop();

hideElement(“image_energy”);