let missiles = [];

let enemies = [];

let gameStarted = false;

let gameOver = false;

​

function setup() {

  createCanvas(400, 600);

  textAlign(CENTER);

  textSize(32);

  player = new Player();

}

​

function draw() {

  background(0);

​

  if (!gameStarted) {

    showTitleScreen();

    return;

  }

​

  if (gameOver) {

    showGameOverScreen();

    return;

  }

​

  player.update();

  player.show();

​

  if (frameCount % 60 === 0) {

    enemies.push(new Enemy());

  }

​

  for (let i = missiles.length - 1; i >= 0; i--) {

    missiles[i].update();

    missiles[i].show();

​

    if (missiles[i].hits(enemies)) {

      missiles[i].explode();

      missiles.splice(i, 1);

    } else if (missiles[i].offscreen()) {

      missiles.splice(i, 1);

    }

  }

​

  for (let i = enemies.length - 1; i >= 0; i--) {

    enemies[i].update();

    enemies[i].show();

​

    if (enemies[i].hits(player)) {

      gameOver = true;

    }

​

    if (enemies[i].offscreen()) {

      enemies.splice(i, 1);

    }

  }

}

​

function keyPressed() {

  if (!gameStarted && keyCode === 32) {

    gameStarted = true;

  }

​

  if (gameOver && keyCode === 32) {

    resetGame();

  }

​

  if (keyCode === 77) { // 'm' key

    missiles.push(new Missile(player.x, height - 40));

  }

​

  if (keyCode === LEFT_ARROW) {

    player.setDir(-1);

  } else if (keyCode === RIGHT_ARROW) {

    player.setDir(1);

  }

}

​

function keyReleased() {

  if (keyCode === LEFT_ARROW || keyCode === RIGHT_ARROW) {

    player.setDir(0);

  }

}

​

function showTitleScreen() {

  fill(255);

  text("ORPHE Shooting", width / 2, height / 2);

  text("Press SPACE to start", width / 2, height / 2 + 50);

}

​

function showGameOverScreen() {

  fill(255);

  text("Game Over", width / 2, height / 2);

  text("Press SPACE to restart", width / 2, height / 2 + 50);

}

​

function resetGame() {

  gameOver = false;

  player = new Player();

  missiles = [];

  enemies = [];

}

​

class Player {

  constructor() {

    this.x = width / 2;

    this.dir = 0;

  }

​

  setDir(dir) {

    this.dir = dir;

  }

​

  update() {

    this.x += this.dir * 5;

    this.x = constrain(this.x, 30, width - 30);

  }

​

  show() {

    fill(0, 255, 0);

    rectMode(CENTER);

    rect(this.x, height - 20, 20, 40);

  }

}

​

class Missile {

  constructor(x, y) {

    this.x = x;

    this.y = y;

  }

​

  update() {

    this.y -= 5;

  }

​

  show() {

    fill(255);

    rectMode(CENTER);

    rect(this.x, this.y, 5, 10);

  }

​

  hits(enemies) {

    for (let i = enemies.length - 1; i >= 0; i--) {

      let enemy = enemies[i];

      if (dist(this.x, this.y, enemy.x, enemy.y) < 15) {

        return true;

      }

    }

    return false;

  }

​

  explode() {

    // Add explosion effect here

  }

​

  offscreen() {

    return this.y < 0;

  }

}

​

class Enemy {

  constructor() {

    this.x = random(width);

    this.y = -30;

  }

​

  update() {

    this.y += 3;

  }

​

  show() {

    fill(255, 0, 0);

    rectMode(CENTER);

    rect(this.x, this.y, 30, 30);

  }

​

  hits(player) {

    return dist(this.x, this.y, player.x, height - 20) < 25;

  }

​

  offscreen() {

    return this.y > height;

  }

}

​