​

  constructor(x, spaceshipImage) {

    this.x = x;

    this.score = 0;

    this.r = 15;

    this.respawn();

    // store the image in the ship object

    this.spaceshipImage = spaceshipImage;

  }

  update() {

    if (this.isUp && this.y > 0) {

        this.up();

    } else if (this.isDown && this.y < height - 20) {

        this.down();

    }

    if (this.hasPlayerScoredAPoint()) {

        this.score ++;

      this.respawn();

    }

  }

  display() {

    // display our beautiful ship to the world!

    imageMode(CENTER);

    image(this.spaceshipImage, this.x, this.y, this.r*2, this.r*2);

  }

  up() {

    this.y--;

  }

  down() {

    this.y++;

  }

  hasPlayerScoredAPoint() {

    if (this.y <= 0) {

        return true;

    }

    return false;

  }

  respawn() {

    this.y = height - 20;

    this.isUp = false

    this.isDown = false;

  }

​

}