Flappy02

float obspos, obsw = 20, h, d, obsspeed = 5;
boolean gameover = false;
PImage flappy;
float xpos = 100, ypos = 400, birdsize = 40, speed = 4;

void setup(){
  size(500, 800);
  obspos = width;
  h = random(50, 600);
  d = random(50, 150);
  flappy = loadImage("flappy.png");
}

void draw(){
  if (!gameover){
    background(0, 0, 255);
    obstacle();
    bird();
    collision();
  } else {
    textSize(50);
    text("Game over", 100, 200);
  }
}

void obstacle(){
  fill(0, 255, 0);
  rect(obspos, 0, obsw, h);
  rect(obspos, h + d, obsw, height - (h + d));
  obspos = obspos - obsspeed;
  if (obspos < 0){
    obspos = width;
    h = random(50, 600);
    d = random(50, 150);
  }
}

void bird(){
  image(flappy, xpos, ypos, birdsize, birdsize);
  if (keyPressed && key == ' '){
    ypos -= speed;
  } else {
    ypos += speed;
  }
}

void collision(){
  if (ypos + birdsize > height){
    gameover = true;
  }
  if (xpos + birdsize > obspos && xpos < obspos + obsw){
    if (ypos < h || ypos + birdsize > h + d){
      gameover = true;
    }
  }
}