Collision detection of array objects

The problem is in the function checkCollision1(), replace this[0] for only this.

 checkCollision1(){
    if (me2.x + me2.w > this.x && me2.x < this.x + me2.w && me2.y + me2.h/2 > this.y && me2.y < this.y + this.h){
      scene = 5
    } 
  }

If you want select the scene of the collision, i recommend use params like that:

  checkCollision(sceneWanted){
    if (me2.x + me2.w > this.x && me2.x < this.x + me2.w && me2.y + me2.h/2 > this.y && me2.y < this.y + this.h){
      scene = sceneWanted;
    } 
  }

And when you check the collisions use this new function:

function hourGlassroom() {
  push()
  background(25, 25, 50)
  for (var i = 0; i < stars.length; i++) {
    stars[i].body();
  }
    for (let i = 0; i < timekNum; i++) {
  timekeeper[i].body()
    }
  me2.body()
  me2.move2()
  timekeeper[0].checkCollision(5)
  timekeeper[1].checkCollision(6)
  timekeeper[2].checkCollision(7)
  timekeeper[3].checkCollision(8)
  pop()
}

After this point maybe you will have a problems with that the only timekeeper that work is the first, this is because you created all timekeeper with the same X and Y params.

function setup() {
  createCanvas(640, 360);
  noStroke();
  frameRate(fps);
  y = 359;
  vid.loop();
  vid.hide();

  for (let i = 0; i < cloudNum; i++) {
    clouds[i] = new Cloud(random(width), random(height - 180));
  }

  me = new Emi(10, 220);
  
  me2 = new Emi(20, 300);
  for (let i = 0; i < timekNum; i++) {
    timekeeper[i] = new HourGlass(100, height / 2);
  }
  //All timekeeper with the same X and Y params HERE !!.

  for (var i = 0; i < 1000; i++) {
    stars[i] = new Star();
  }
}

Effectively you move all timekeepers in the canvas, but you need update his X and Y params like this.

 body(i) {
    imageMode(CENTER);
    this.x = 100+(i*150);
    this.rad += 0.05;
    if(this.rad > 2*PI) this.rad = 0;
    this.y = (height/2 + sin(this.rad)*20);
    image(hourglass, this.x , this.y, this.w, this.h);
  }