TIC-80 code

// title:  space invaders
// author: nooh alavi
// desc:   pls subscribe <3
// script: js

var ship;

var bullets = [];
var enemies = [];

var spawnRate = 5; //seconds before enemies spawn
var eTime = 0;
var secs = 0;

//

function Bullet(_x, _y, _e) {
    this.x = _x;
    this.y = _y;
    this.isEnemyBullet = _e;

    this.render = function() {
        if (this.isEnemyBullet) {
            spr(4, this.x, this.y, 0);
        } else {
            spr(2, this.x, this.y, 0);
        }
    }

    this.update = function() {
        if (this.isEnemyBullet) {
            this.y++;
        } else {
            this.y--;
        }
    }

    this.isCollidingWith = function(obj) {
        return (this.x + 8 > obj.x && this.y + 8 > obj.y && obj.x + 8 > this.x && obj.y + 8 > this.y    );
    }
}

function Enemy(_x, _y) {
    this.x = _x;
    this.y = _y;
    this.dir = 1;

    this.render = function() {
        spr(3, this.x, this.y, 0);
    }

    this.update = function() {
        this.x += this.dir;

        if (this.x < 0) {
            this.x = 0;
            this.y += 8;
            this.dir = 1;
        } else if (this.x > 240-8) {
            this.x = 240-8;
            this.y += 8;
            this.dir = -1;
        }

        if (Math.random() <= 0.01) {
            this.shoot();
        }
    }

    this.shoot = function() {
        bullets.push(new Bullet(this.x, this.y, true));
    }
}

//

function init() {
    ship = {
        x: 120,
        y: 100
    }

    bullets = [];
    enemies = [];

    var secs = 0;
}

function shoot(x, y, e) {
    bullets.push(new Bullet(x, y, e));
}

function spawnEnemies() {
    for (var i = 0; i < 240/8; i++) {
        enemies.push(new Enemy(i * 8, 0));
    }
}

function update() {

    eTime++;

    if (key(23)) {
        ship.y--;
    } else if (key(19)) {
        ship.y++;
    }
    if (key(1)) {
        ship.x--;
    } else if (key(4)) {
        ship.x++;
    }

    if (keyp(48)) {
        shoot(ship.x, ship.y, false);
    }

    if (ship.x + 8 > 240) {
        ship.x = 240 - 8;
    } if (ship.x < 0) {
        ship.x = 0;
    } if (ship.y < 0) {
        ship.y = 0;
    } if (ship.y + 8 > 136) {
        ship.y = 136 - 8;
    }

    for (var i =0; i < bullets.length; i++) {
        bullets[i].update();
        for (var j = 0; j < enemies.length; j++) {
            if (bullets[i].isCollidingWith(enemies[j]) && !bullets[i].isEnemyBullet) {
                enemies.splice(j, i)
            }
            if (bullets[i].isCollidingWith(ship)) {
                init();
            }
        }
        if (bullets[i].y < 0 || bullets[i].y > 240) {
            bullets.splice(i, 1);
        }
    }

    for (var i =0; i < enemies.length; i++) {
        enemies[i].update();
    }

    secs = (eTime/60);

    if (secs % spawnRate == 0.5) {
        spawnEnemies();
    }
}

function render() {
    cls();
    map(0);
    spr(1, ship.x, ship.y, 0);

    for (var i=0; i < bullets.length; i++) {
        bullets[i].render();
    }
    for (var i=0; i < enemies.length; i++) {
        enemies[i].render();
    }
}

init()
function TIC() {
    update();
    render();
}