Is there a way where I can randomize the slide image on each load?

[thousandzero]

Test case: https://codepen.io/desandro/pen/azqbop

[clarknelson]

I think you will need to create the gallery with javascript, so you can attach events.

var flkty = new Flickity( '.carousel', {
  on: {
    ready: function() {
      const galleryLength = this.getCellElements().length;
      this.selectCell( Math.floor(galleryLength * Math.random()), true, true );
    }
  }
});

See https://flickity.metafizzy.co/api.html#selectcell for more details.